Đề thi chọn học sinh giỏi cấp tỉnh lớp 9 môn Tiếng Anh - Năm 2018

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 SỞ GIÁO DỤC VÀ ĐÀO TẠO KỲ THI CHỌN HỌC SINH GIỎI
 CẤP TỈNH LỚP 9 NĂM 2018
 MÔN: TIẾNG ANH
 Thời gian làm bài: 120 phút (không kể thời gian phát đề)
 Ngày thi: .
-------------------------------------------------------------------
Bộ đề thi học sinh giỏi gồm 42 đề có đáp án chi tiết và file mp3
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SECTION I: LISTENING (3.0 points) (You will hear twice for each part)
Part 1. You will hear a doctor talking about how people can lead a healthier life. For each 
question, put a tick in the correct box.
1. To become healthier you should _______.
A. dramatically change your life 
B. change some daily habits. 
C. eat hardly anything.
2. If you don't manage to exercise as much as you should _______.
A. leave the gym.
B. try not to be negative about it.
C. be angry with yourself.
3. To improve your mood you should ________.
A. drink more tea and coffee.
B. only eat vegetables.
C. increase the amount of vegetables you eat.
4. The survey ________.
A. showed quite dramatic results.
B. didn't have strong results.
C. didn't give any useful information.
5. Youshould always ________.
A. do important jobs first.
B. do everything as quickly as possible.
C. fry to finish what you start 
6. The doctor says ________.
ĐỀ THI SỐ 01
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A. you should never have a late night
B. lack of sleep causes brain disease.
C. it's okay to go to bed late sometimes.
Part 2. You will hear a tour guide giving information about an old British house. For each 
question. fill in the missing information in the numbered space.
- The house was built in the (7) ....
- The Reynold family lived in the house until (8) ....
- The servants had rooms in the (9) ....
- The art collection is in the (10) ....
- George Reynold was a (11) ....
- George's son Michael died from (12) ....
- Wife died while giving birth to their (13) ....Emily. 
- George's brother died in a (14) ....riding accident.
- George died of a heart attack at the age of (15) ....
SECTION II: LEXICO – GRAMMAR (7.0 points)
Part 1: Questions from 16 to 36. (3.0 points - 0.15/ each)
Choose the best answer to each question. 
16. As a citizen, it is normal to _________ to the laws and rules made by the society. 
A. conform B. resist C. hinder D. obey 
17. He attempted to _________the painting from the gallery but he was caught. 
A. rob B. steal C. thief D. kidnap
18. Once the computer virus was removed, a lot of information ________.
A. is disappearing B. will have disappeared
C. disappears D. disappeared 
19. Telecommuter boosters will often mention _________convenient it is for people wishing to cut 
down on their work hours. 
A. how B. therefore C. only D. most
20. A: “Will the Jackson be invited?”– B: “I_________.” 
A. expect so not B. so expect C. expect so D. don’t expect
21. I read the contract again and again ___________avoiding making spelling mistakes. 
A. with a view to B. on account of C. by means of D. in terms of
22. In a report submitted to the government yesterday, scientists __________that the building of 
the bridge be stopped. 
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A. banned B. complained C. said D. recommended
23. Anyone ordering a new MP3 player _________ the end of the month will receive a free extra set 
of headphones. 
A. at B. in C. upon D. before
24. I enjoyed reading that story. It was rather sad, _________. 
A. also B. though C. but D. so
25. My job is so ________ that I don’t think I’ll be able to take a summer break. 
A. persisting B. hard C. demanding D. tough
26. A number of students ________ for a rise since last year
A. asked B. has asked C. ask D. have asked
27. I have been fascinated by _________ since I was at secondary school.
A. photographic B. photographer C. photograph D. photography
28. She has difficulty ________ and ________ English.
A. speak-writing B. to speak- to write C. speak-write D. speaking-writing
29. Her mother’s illness cast a cloud__________her wedding day
A. for B. over C. on D. in
30. I don’t really___________winter sports very much
A. deal with B. face up to C. get round to D. go in for
31. The meeting was _______ off at the last minute because the papers were not ready.
A. stopped B. broken C. called D. turned
32. There are still, however, rather a lot of obstacles to ________.
A. overcome B. come over C. solve D. resolve
33. __________ the barrier at the side of the road, the car would have crashed into the valley below.
A. But for B. Apart from C. Except for D. Unless
34. She has quite a good _____ of English. 
A. result B. pass C. understanding D. head 
35. According to the _____ of the contract, tenants must give six months notice if they intend to 
leave. 
A. laws B. rules C. terms D. details 
Part 2: Questions from 36 to 45. (2 points - 0.2/ each)
Use the correct form of the word in brackets to complete the following sentences.
36. There are some ....to every grammatical rule. EXCEPT
37. The engineering sector achieved significant ....last year. GROW
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38. I have a ....of old records from my grandma. COLLECT
39. He'll ....be coming later. SURE
40. Eric Clapton's guitar solos are ..... LEGEND
41. It was one of the most ....plays I've seen recently. ENJOY
42. In her time, Marilyn Monroe was a very ....actress. GLAMOUR
43. It's ....to tell whether he's lying or not. POSSIBLE
44. He's no worldwide star, but he had very humble ..... BEGIN
45. They took ....of noise levels inside the building. MEASURE
Part 3: Questions from 46 to 50.(1 point - 0.2/ each)
Each of the following sentences has an error. Find the errors and correct them.
46. Caroline refused taking the job given to her because the salary was not good.
47. While the brows were away on holiday, their house was broke into.
48. Why don’t you congratulate our son about passing his final exam?
49. There is such few ink that it will be impossible tofinish addressing the envelopes.
50. I found it wonderfully to travel abroad.
Part 4: Questions from 51 to 55.(1 point - 0.2/ each)
Fill in each of the sentences with correct prepositions.
51. Have you heard? Sam's got engaged ..Susan.
52. Let me run ...a few of the benefits our scheme offers you.
53. I think that ..the circumstances it would be a good idea if you stayed at home for a few days.
54. Therefore, ..accordance with our regulations, you will be issued with a formal written warning.
55. Following the financial scandal he left the job ....disgrace.
SECTION III: READING (6.0 points)
Part 1. Questions 56 – 65 (2 points - 0.2/ each)
Read the passage below and choose the best answer to each of the following blanks. 
SOUND ADVICE FOR LANGUAGE LEARNERS
A recent survey of a language learning magazine has consulted a number of experts in the 
(56) _______ of a second language acquisition. Their advice may prove invaluable for those (57) 
_______ a language course. One suggestion is that you (58) _______ whether you are likely to be 
successful at learning a language? Did you enjoy studying languages at school, for example? The 
major (59) ________ will be your own time and effort. Therefore, you must be sure that the course 
on offer leads to a (60) _______qualification. Also, be realistic in your (61) ________. If you don’t 
set achievable aims, you are more likely to give up. Do not be deceived (62) _______ thinking that 
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the most expensive courses are the best. (63) _________ around to get the best possible value for 
money. You should also bear in mind that the faster you learn a language, the more quickly you 
forget it. Sandra Miller, a French teacher, tried to teach herself German by rolling on a (64) 
________ course. Already fluent in four languages and with a sound knowledge of teaching 
methodology her chances of (65) ________ progress were high. Three years on she remembers very 
little. She feels her biggest mistake was not to follow up her first experience. “I should have 
consolidated what I’d learnt by continuing to study, even if it were by myself.”
56. A. branch B. field C. area D. domain
57. A. considering B. wondering C. thinking D. looking
58. A. survey B. review C. balance D. assess
59. A. price B. charge C. cost D. valuation
60. A. valued B. regarded C. understood D. recognised
61. A. ends B. sights C. goals D. objects
62. A. into B. about C. by D. in
63. A. Nose B. Shop C. Push D. Run
64. A. rapid B. quick C. fast D. crash 
65. A. achieving B. making C. doing D. gaining
Part 2. Questions 66 – 75 (2.0 points - 0.2/ each)
Read the passage below and choose the best answer to each question 
The ability to conduct electricity is one of the key properties of a metal. Other solid material 
such as silicon can conduct electricity but only effectively at certain temperatures. Also, some 
substances such as salt (sodium chloride) can conduct when molten or when dissolved in water. The 
ability of metals to conduct electricity is due to how their atoms bond together. In order to bond 
together the metal atoms lose at least one of their outermost electrons. This leaves the metal atoms 
with a positive charge and they are now strictly ions. The lost electrons are free to move in what are 
known as a sea of electrons. Since the electrons are negatively charged they attract the ions and this 
is what keeps the structure together.
An electric current is a flow of charge and since the electrons in the sea of electrons are free 
to move they can be made to flow in one direction when a source of electrical energy such as a 
battery is connected to the metal. Hence we have an electric current flowing through the wire, and 
this is what makes metals such good conductors of electricity. The only other common solid 
conducting material that pencil users are likely to encounter is graphite (what the ‘lead’ of a pencil is 
made from). Graphite is a form of carbon and again the carbon atoms bond in such a way that there 
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is a sea of electrons that can be made to flow as an electric current. Likewise, if we have an ionic 
substance like salt we can make the electrically charged ions flow to create a current but only when 
those ions are free to move, either when the substance is a liquid or dissolved in water. In its solid 
state an ionic substance like salt cannot conduct electricity as its charged ions cannot flow.
Electrical insulators are substances that cannot conduct electricity well either, because they 
contain no charged particles or any charged particles they might contain do not flow easily. Water 
itself is a poor conductor or electricity as it does not contain a significant amount of fully charged 
particles (the ends of a water molecule are partly charged but overall the molecule is neutral). 
However, most water we encounter does contain dissolved charged particles, so it will be more 
conductive than pure water. Many of the problems that occur when touching electrical devices with 
wet hands result from the ever-present salt that is left on our skin through perspiration and it 
dissolves in the water to make it more conductive.
66. Electrical conductivity is ________.
A. one of the most important properties of metals
B. one of the key properties of most solid materials
C. impossible for any substance when it is dissolved in water
D. completely impossible for silicon
67. According to the passage, a metal can conduct electricity due to ________.
A. the absence of free electrons B. its atoms with a positive charge
C. the way its atoms bond together D. the loss of one electron in the core of its atoms
68. The word “outermost” in paragraph 1 mostly means ________.
A. the lightest. B. nearest to the inside.
C. furthest from the inside. D. the heaviest.
69. The atoms of a metal can bond together because ________.
A. the lost electrons cannot move freely in the sea of electrons
B. electrons can flow in a single direction
C. they lose all of electrons
D. negatively charged electrons attract positive ions
70. Salt in its solid state is not able to conduct electricity because ________.
A. it has free electrons B. its charged ions can flow easily
C. it cannot create any charge ions D. it charged ions are not free to move
71. The word “they” in paragraph 3 refers to ________.
A. charged ions B. electric currents C. charged particles D. electrical insulator
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72. Water is a poor conductor because it contains ________.
A. no positive or negative electric charge
B. only a small amount of fully charged particles
C. only a positive electric charge
D. only a negative electric charge
73. We can have problems when touching electrical devices with wet hands because ________.
A. the eater itself is a good conductor of electricity
B. the water dissolves the salt on our skin and becomes more conductive
C. the water contains too many neutral molecules
D. the water containing no charged particles makes it more conductive
74. Which of the following is NOT true according to the passage?
A. Pure water is much more conductive than most water we encounter every day.
B. Graphite is a common solid substance that can conduct electricity.
C. Salt can conduct electricity when it is molten or dissolved.
D. Some materials are more conductive than others.
75. Which of the following could best serve as the title of the passage?
A. Electrical Energy B. Electrical Devices C. Electrical Insulators D. Electrical Conductivity
Part 3: Questions 76 – 85 (2.0 points - 0.2/ each)
Read the text and fill in one word which best fits each gap.
These days it is impossible to open a newspaper (76) .... reading about the 
damage we are doing to the environment. The earth is being threatened (77) .... the 
future looks bad (78) .... can each of us do? We cannot clean (79) .... our 
polluted rivers and seas overnight. Nor we can stop the(80) .... of plants and animals. 
But we can stop adding to the problem (81) .... scientists look for answer. It may not be 
easy to change your lifestyle (82) .... but some steps are easy to take: cut down the 
amount of driving you do, or use as little plastic as possible. It is also easy to save (83) 
...., which also (84) .... household bills. We all make a personal decision to 
work for the future of our planet if we want to ensure a better world (85) .... our 
grandchildren.
Part 1: Questions from 86 to 90. (1 point- 0.2/ each)
Finish each of the following sentences in such a way that it means the same as the sentence 
printed before it. 
86. It was careless of you to allow your 16-year-old son to drive your car.
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 You should ........................................................................................................................................................................................................
87. I shall never lend John any money, no matter what happens.
 Under no ............................................................................................................................................................................................................
88. “You broke my bicycle, Minh!” said Hoa. 
 Hoa accused ....................................................................................................................................................................................................
89. I regret not buying any tickets for the concert.
 I wish .....................................................................................................................................................................................................................
90. Tim looks nothing like his father.
 Tim doesn’t .....................................................................................................................................................................................................
Part 2: Questions from 91 to 95. (1 points - 0.2/ each)
Complete the second sentence so that it has a similar meaning to the first sentence, using the 
word given. Do not change the word given.
91. I don’t intend to apologize to either of them. (intention)
 I have .. to either of them
92. “It was my fault to break your vase yesterday” said Jane to her brother. (admitted)
 Jane .. brother’s vase yesterday. 
93. You should think about the price before you decide whether to buy it or not. (consideration)
 You should .. before you decide whether to buy it or not.
94. I find driving on the left in England very strange. (acustomed)
 I am .. on the left in England.
95. She always has a good relationship with the children. (gets)
 She always . the children.
THE END ...
- Thí sinh không được sử dụng tài liệu
- Giám thị không giải thích gì thêm
Bộ đề thi học sinh giỏi gồm 42 đề có đáp án chi tiết và file mp3
Ai có nhu cầu mua cả bộ đề:
Liên Hệ số điện thoại: 0971.192.688
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SỞ GIÁO DỤC VÀ ĐÀO TẠO
(Đề thi gồm có 08 trang)
KỲ THI CHỌN HỌC SINH GIỎI
CẤP TỈNH LỚP 9 NĂM 2018
MÔN: TIẾNG ANH
Thời gian làm bài: 120 phút (không kể thời gian phát đề)
Ngày thi: .
SECTION I: LISTENING (3.0 points) (You will hear twice for each part)
Part 1. you will hear a doctor talking about how people can lead a healthier life. For each 
question, put a tick in the correct box.
1. To become healthier you should ________.
A. dramatically change your life 
B. change some daily habits. 
C. eat hardly anything.
2. If you don't manage to exercise as much as you should ________.
A. leave the gym.
B. try not to be negative about it.
C. be angry with yourself.
3. To improve your mood you should ________.
A. drink more tea and coffee.
B. only eat vegetables.
C. increase the amount of vegetables you eat.
4. The survey ________.
A. showed quite dramatic results.
B. didn't have strong results.
C. didn't give any useful information.
5. Youshould always ________.
A. do important jobs first.
B. do everything as quickly as possible.
Họ và tên thí sinh: .......................................................................................Số báo danh: ..
Giám thị 1: .......................................................................................................
Giám thị 2: .......................................................................................................
ĐỀ THI SỐ 01
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C. try to finish what you start
6. The doctor says ________.
A. you should never have a late night
B. lack of sleep causes brain disease.
C. it's okay to go to bed late sometimes.
Part 2. You will hear a tour guide giving information about an old British house. For each 
question. fill in the missing information in the numbered space.
- The house was built in the (7) 19th century
- The Reynold family lived in the house until (8) 1975 
- The servants had rooms in the (9) attic 
- The art collection is in the (10) dining room 
- George Reynold was a (11) lawyer
- George's son Michael died from (12) cancer
- Wife died while giving birth to their (13) daughter Emily. 
- George's brother died in a (14) horse riding accident.
- George died of a heart attack at the age of (15) 52
SECTION II: LEXICO – GRAMMAR (7.0 points)
Part 1: Questions from 16 to 36. (3.0 points - 0.15/ each)
Choose the best answer to each question. 
16. As a citizen, it is normal to _________ to the laws and rules made by the society. 
A. conform B. resist C. hinder D. obey 
conform (+ to) theo, làm theo, tuân theo, y theo, chiếu theo
resist kháng cự, chống lại
hinder cản trở, gây trở ngại
obey vâng lời nghe lời, tuân theo, tuân lệnh
17. He attempted to _________the painting from the gallery but he was caught. 
A. rob B. steal C. thief D. kidnap
18. Once the computer virus was removed, a lot of information ________.
A. is disappearing B. will have disappeared
C. disappears D. disappeared 
19. Telecommuter boosters will often mention _________convenient it is for people wishing to cut 
down on their work hours. 
A. how B. therefore C. only D. most
20. A: “Will the Jackson be invited?”– B: “I_________.” 
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A. expect so not B. so expect C. expect so D. don’t expect
21. I read the contract again and again ___________avoiding making spelling mistakes. 
A. with a view to B. on account of C. by means of D. in terms of
with a view to + V_ing với ý định
22. In a report submitted to the government yesterday, scientists __________that the building of 
the bridge be stopped. 
A. banned B. complained C. said D. recommended
recommended + that + S + V_infi / be + V3/ed
23. Anyone ordering a new MP3 player _________ the end of the month will receive a free extra set 
of headphones. 
A. at B. in C. upon D. before
24. I enjoyed reading that story. It was rather sad, _________. 
A. also B. though C. but D. so
25. My job is so ________ that I don’t think I’ll be able to take a summer break. 
A. persisting B. hard C. demanding D. tough
- persisting kiên gan, bền bỉ
- demanding (a) đòi hỏi khắt khe
- tough (a) cứng rắn, cứng cỏi, bất khuất
26. A number of students ________ for a rise since last year
A. asked B. has asked C. ask D. have asked
27. I have been fascinated by _________ since I was at secondary school.
A. photographic B. photographer C. photograph D. photography
photography (n) thuật nhiếp ảnh, thuật chụp ảnh; sự chụp ảnh
photograph (n) ảnh, bức ảnh
photographer (n) nhà nhiếp ảnh, thợ nhiếp ảnh
photographic (a) như chụp ảnh
28. She has difficulty ________ and ________ English.
A. speak-writing B. to speak- to write C. speak-write D. speaking-writing
29. Her mother’s illness cast a cloud__________her wedding day
A. for B. over C. on D. in
30. I don’t really___________winter sports very much
A. deal with B. face up to C. get round to D. go in for
go in for = like
31. The meeting was _______ off at the last minute because the papers were not ready.
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A. stopped B. broken C. called D. turned
call off = postpone = delay đình lại, hoãn lại, ngừng lại; bỏ đi
32. There are still, however, rather a lot of obstacles to ________.
A. overcome B. come over C. solve D. resolve
obstacles vật chướng ngại, trở lực overcome vượt qua, khắc phục
resolve giải quyết, kiên quyết
33. __________ the barrier at the side of the road, the car would have crashed into the valley below.
A. But for B. Apart from C. Except for D. Unless
But for nếu không vì (dùng cho câu điều kiện)
Apart from = Except for ngoài ra / ngoại trừ Unless trừ khi
34. She has quite a good _____ of English. 
A. result B. pass C. understanding D. head 
- Have a good understanding of s.thing:Am hiểu về cái gì đó 
- Have a good head for s.thing:Có năng khiếu về cái gì đó
35. According to the _____ of the contract, tenants must give six months notice if they intend to 
leave. 
A. laws B. rules C. terms D. details 
- Term of the contract (n):Điều khoản trong hợp đồng
Part 2: Questions from 36 to 45. (2 points - 0.2/ each)
Use the correct form of the word in brackets to complete the following sentences.
36. There are some exceptions to every grammatical rule. EXCEPT
37. The engineering sector achieved significant growth last year. GROW
38. I have a collection of old records from my grandma. COLLECT
39. He'll surely be coming later. SURE
40. Eric Clapton's guitar solos are legendary. LEGEND
41. It was one of the most enjoyable plays I've seen recently. ENJOY
42. In her time, Marilyn Monroe was a very glamorous actress. GLAMOUR
43. It's impossible to tell whether he's lying or not. POSSIBLE
44. He's no worldwide star, but he had very humble beginnings. BEGIN
45. They took measurements of noise levels inside the building. MEASURE
take measurements of sth đo kích cỡ của
Part 3: Questions from 46 to 50.(1 point - 0.2/ each)
Each of the following sentences has an error. Find the errors and correct them.
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46. Caroline refused taking the job given to her because the salary was not good.  to take
47. While the brows were away on holiday, their house was broke into.  broken
48. Why don’t you congratulate our son about passing his final exam?  on
49. There is such few ink that it will be impossible tofinish addressing the envelopes.  little
50. I found it wonderfully to travel abroad.  wonderful 
Part 4: Questions from 51 to 55.(1 point - 0.2/ each)
Fill in each of the sentences with correct prepositions.
51. Have you heard? Sam's got engaged to Susan.
52. Let me run through a few of the benefits our scheme offers you.
run through = apply thoroughly; think through
53. I think that under the circumstances it would be a good idea if you stayed at home for a few days.
54. Therefore, in accordance with our regulations, you will be issued with a formal written warning.
in accordance with theo như
55. Following the financial scandal he left the job in disgrace.
in disgrace sự ô nhục, sự nhục nhã, sự hổ thẹn; điều ô nhục, điều nhục nhã, điều hổ thẹn
SECTION III: READING (6.0 points)
Part 1. Questions 56 – 65 (2 points - 0.2/ each)
Read the passage below and choose the best answer to each of the following blanks. 
SOUND ADVICE FOR LANGUAGE LEARNERS
A recent survey of a language learning magazine has consulted a number of experts in the 
(56) _______ of a second language acquisition. Their advice may prove invaluable for those (57) 
_______ a language course. One suggestion is that you (58) _______ whether you are likely to be 
successful at learning a language? Did you enjoy studying languages at school, for example? The 
major (59) ________ will be your own time and effort. Therefore, you must be sure that the course 
on offer leads to a (60) _______qualification. Also, be realistic in your (61) ________. If you don’t 
set achievable aims, you are more likely to give up. Do not be deceived (62) _______ thinking that 
the most expensive courses are the best. (63) _________ around to get the best possible value for 
money. You should also bear in mind that the faster you learn a language, the more quickly you 
forget it. Sandra Miller, a French teacher, tried to teach herself German by rolling on a (64) 
________ course. Already fluent in four languages and with a sound knowledge of teaching 
methodology her chances of (65) ________ progress were high. Three years on she remembers very 
little. She feels her biggest mistake was not to follow up her first experience. “I should have 
consolidated what I’d learnt by continuing to study, even if it were by myself.”
56. A. branch B. field C. area D. domain
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57. A. considering B. wondering C. thinking D. looking
58. A. survey B. review C. balance D. assess
59. A. price B. charge C. cost D. valuation
60. A. valued B. regarded C. understood D. recognised
61. A. ends B. sights C. goals D. objects
62. A. into B. about C. by D. in
63. A. Nose B. Shop C. Push D. Run
64. A. rapid B. quick C. fast D. crash 
65. A. achieving B. making C. doing D. gaining
Part 2. Questions 66 – 75 (2.0 points - 0.2/ each)
Read the passage below and choose the best answer to each question 
(The ability to conduct electricity is one of the key properties of a metal. Other solid material 
such as silicon can conduct electricity but only effectively at certain temperatur_1). Also, some 
substances such as salt (sodium chloride) can conduct when molten or when dissolved in water. The 
(ability of metals to conduct electricity is due to how their atoms bond together_2). In order to bond 
together the metal atoms lose at least one of their outermost electrons. This leaves the metal atoms 
with a positive charge and they are now strictly ions. The lost electrons are free to move in what are 
known as a sea of electrons. (Since the electrons are negatively charged they attract the ions and 
this is what keeps the structure together_4).
An electric current is a flow of charge and since the electrons in the sea of electrons are free 
to move they can be made to flow in one direction when a source of electrical energy such as a 
battery is connected to the metal. Hence we have an electric current flowing through the wire, and 
this is what makes metals such good conductors of electricity. The only other common solid 
conducting material that pencil users are likely to encounter is graphite (what the ‘lead’ of a pencil is 
made from). Graphite is a form of carbon and again the carbon atoms bond in such a way that there 
is a sea of electrons that can be made to flow as an electric current. Likewise, if we have an ionic 
substance like salt we can make the electrically charged ions flow to create a current but only when 
those ions are free to move, either when the substance is a liquid or dissolved in water. (In its solid 
state an ionic substance like salt cannot conduct electricity as its charged ions cannot flow_5).
Electrical insulators are substances that cannot conduct electricity well either, because they 
contain no charged particles or any charged particles they might contain do not flow easily. (Water 
itself is a poor conductor or electricity as it does not contain a significant amount of fully charged 
particles_7) (the ends of a water molecule are partly charged but overall the molecule is neutral). 
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However, most water we encounter does contain dissolved charged particles, so it will be more 
conductive than pure water. (Many of the problems that occur when touching electrical devices with 
wet hands result from the ever-present salt that is left on our skin_8) through perspiration and it 
dissolves in the water to make it more conductive.
66. Electrical conductivity