Đề ôn tập môn Tiếng Anh Lớp 9 - Unit 6 đến unit 10

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UNIT 6: ENVIRONMENT 
I. Choose the correct answer to fill in each blank. 
One of the most serious problems (1) . Human life is the dirtying and poisoning of air and 
water. It is the pollution of our environment. Air pollution (2) .when wastes are poured 
into the atmosphere and the air becomes contaminated and unpleasant to (3) .. We 
depend (4) .. life on the air we breathe. As the air becomes more (5) ...................... 
More polluted, hazards to health increase. Today we have industrial air pollutants from factories and mills 
and engine – exhaust fumes. That‟s (6) .some large cities have to ban cars from the city 
centre to wipe out smoke and limit the emission of poisonous gases and dangerous chemicals from 
industrial smoke stacks in (7) to clean the air in our living environment as much as 
(8) . 
 1. A threating B. threatened C. threatens D. threaten 
 2. A. occurs B. exits C. appears D. becomes 
 3. A. breath B. breathing C. breathe D. breaths 
 4. A. on B. for C. at D. but 
 5. A. or B. so C. and D. as 
 6. A. what B. how C. why D. who 
 7. A. order B. as C. so D. but 
 8. A. well B. long C. possible D. able 
II. Choose the best answer A, B, C or D to complete each of the following sentences. 
1.Mai is talking _____ because she has done her test perfectly. 
 A. happy B. happily C. unhappy D. unhappily. 
2. If you________ do that exercise, I‟ll explain for you. 
 A. can B. could C. can‟t D. couldn‟t 
3. We can reduce air pollution by________ public buses instead of motorbikes. 
 A. using B. use C. used D. usage 
4. Who will provide a picnic lunch__________ the volunteers? 
 A. with B. to C. on D. for 
5. Mrs. Brown forgot her raincoat______ she got wet. 
 A. so B. however C. because D. if 
6. Kate speaks English quite________ after three months learning. 
A. good B. well C. perfect D. best 
7. Tuan‟s mother is very________ that he is doing his best at school. 
 A. please B. pleases C. pleasing D. pleased 
8. Everyone must take part in______ deforestation. 
 A. prevent B. to prevent C. preventing D. prevented 
9. We are talking about the preservation of ______________ resources. 
 A. nature B. natural C. naturally D. naturalize 
10. The air in the city is very _________________. 
 A. pollute B. polluted C. pollution D. pollutant 
11. A large number of inhabitants have made __________ on how to protect the environment. 
 A. suggest B. to suggest C. suggestion D. suggested 
12. She stays at home because she has to take care of her baby. 
 A. look at B. look after C. look up D. look for 
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13. ________________believe that we should preserve the tropical rainforests in the world. 
 A. Consumers B. Aliens C. Conservationists D. Tourists 
III. Read the following passage and decide which option A, B, C, D best fits each space. 
 Everyone wants to reduce pollution. But the pollution problem is as complicated _________ (1) it is 
serious. It is complicated because much _________ (2) is caused by things that benefit people. For 
example, exhaust _________ (3) automobiles causes a large percentage of all air pollution. _________ (4) 
the automobiles provide transportation for millions of people. Factories _________ (5) much of the 
material which pollutes air and water, but factories give employment to a large number of people. 
 Thus, to _________ (6) or greatly reduce pollution immediately, people would have to stop using 
many things that benefit them. Most of the people do not want to do that, of course. But pollution can be 
_________ (7) reduced in several ways. _________ (8) and engineers can work to find ways to lessen the 
_________ (9) of pollution that such things as automobiles and factories cause. Governments can pass and 
enforce laws that require businesses and individuals to stop, or cut _________ (10) on certain polluting 
activities. 
1. A. since B. because C. as D. for 
2. A. pollution B. pollutant C. polluter D. polluting 
3. A. in B. from C. at D. for 
4. A. Therefore B. However C. Moreover D. But 
5. A. offer B. discharge C. emit D. dissolve 
6. A. increase B. pause C. cause D. end 
7. A. increasingly B. gradually C. hopelessly D. dangerously 
8. A. Scientists B. Doctors C. Lecturers D. Botanists 
9. A. number B. figures C. amount D. numbers 
10. A. down B. off C. up D. into 
IV. Choose the best answer to complete the short dialogues. 
1. –“You look nice in your new dress." –“___________________” 
 A. It's nice of you to say so. B. Am I? Thanks. 
 C. Oh, poor me. D. I am interesting to hear that. 
2. –“Do you agree that our present sources of energy will soon end?" –“___________________” 
A. Yes, it might. B. No, I don't. C. Yes, I think so. D. Yes, we do. 
3. –“What a beautiful hat you have! I like it.” –“________________” 
 A. You look nice. B. Oh. It's old. C. It's great. D. Thanks. 
4. –“____________________ " –“Yes. I‟d love to.” 
 A. What do you like doing? B. How about something to drink? 
 C. What about going shopping? D. How do you do? 
5. –“You look more beautiful in your hat and shoes." –“________________” 
 A. Oh, poor me. B. I'm interesting to hear that. 
 C. Am I? Thanks. D. It's very nice of you to say so. 
6. –“________________” –“Oh, it's great!” 
 A. How is the music of the film? B. What do you like the music of the film? 
 C. What do you think of the music of the film? D. Would you like the music of the film? 
7. –“Let's go to the movie now." –“Oh! ________________” 
 A. I need it B. Good idea! C. Why's that? D. I don't. 
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8. – “I wish I could visit your village again some day, Ba.” – “___________.” 
A. Too true! B. You‟re always welcome! C. Yes, let‟s! D. What a day! 
9. – “What would you like to drink? “ – “ __________” 
A. Yes, please B. Milk, please C. No, thanks D. OK 
10. – “Congratulations on your winning –“_____________” 
A. You‟re welcome B. That‟s very kind of you C. No, thanks D. Yes, of course 
V. Read the following passage and decide which answer (A, B, C, or D) best fits each gap. 
Global warming 
Few people now question the reality of global warming and its effects on the world‟s climate. Many 
scientists (1) ________ the blame for recent natural disasters on the increase in the world‟s temperatures 
and are convinced that, more than (2) ________before, the earth is at risk from the forces of the wind, rain 
and sun. (3) ________ to them, global warming is making extreme weather events, such as hurricanes and 
droughts, even more (4) _________and causing sea levels all around the world to (5) ________. 
Environmental groups are putting (6) _________ on governments to take action to reduce the amount of 
carbon dioxide which is given (7) _________ by factories and power plants, thus attacking the problem at 
its source. They are in (8) _________ of more money being spent on research into solar, wind and wave 
energy devices, which could then replace existing power (9) __________. Some scientists, (10) 
__________, believe that even if we stopped releasing carbon dioxide and other gases into the atmosphere 
tomorrow, we would have to wait several hundred years to notice the results. Global warming, it seems, is 
here to stay. 
1. A. put B. give C. take D. have 
2. A. yet B. never C. once D. ever 
3. A. Concerning B. Regarding C. According D. Depending 
4. A. strict B. severe C. strong D. heavy 
5. A. raise B. arise C. rise D. lift 
6. A. force B. encouragement C. persuasion D. pressure 
7. A. off B. away C. up D. over 
8. A. belief B. request C. favor D. suggestion 
9. A. factories B. stations C. houses D. generations 
10. A. however B. although C. despite D. but 
VI. Read the advertisement and then decide whether the following statements are True or False. 
Pollution is a major problem of our times. Air, water and land are all polluted. Poor waste disposal is to 
blame for many of the problems and the situation is particularly acute in heavily industrialized and 
over-populated regions. Pollution of the atmosphere has led to the destruction of the ozone layer and to 
the green house effect. Other environmental problems have been caused by too rapid a use of resources. 
There are far fewer fish in the sea because of over-fishing and the destruction of the rain forests is 
having unforeseen ecological consequences. Battery farming provides a lot of food but involves 
keeping animals in unnatural and unhealthy condition. 
1. . Pollution is an important problem nowadays. 
2. . Pollution of the atmosphere has destroyed the ozone layer. 
3.  There are more fish in the sea due to over-fishing. 
4. . Battery farming provides a lot of food and involves keeping animals in good condition. 
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UNIT 7: SAVING ENERGY 
I. Fill in the blanks with the correct forms of the words given in the box. 
Replace need innovate produce 
Invent light effect long 
 Energy is always one of the most important problems in our modern life. In developed countries, 
electricity, gas, and water are not luxuries but (1) In developing countries, people even reduce 
using electricity, gas, and water. (2)  realize that products must not only work 
(3)but also save money. In the household, (4) often accounts for 15 percent or 
20 percent of electricity bills. That is why some (5)  from the Phillips & Company in 
Holland invented energy saving bulbs calls compact bulbs. They are a good (6)for 100 – watt 
bulbs which are often used. These new products use only a quarter of the electricity of standard bulbs and 
last eight times (7)  Ultimately, the (8) . like compact bulbs will 
save money as well as conserve the Earth‟s resources. 
II. Circle the correct answer A, B, C or D to complete each of the following sentences (2 pts) 
1. Nobody knows exactly there is how much________ left in the world. 
 A. fuel B. saving C. power C. natural resources 
2. Coal, oil and gas are some examples of______ fuels. 
 A. electricity B. water C. fossil D. power 
3. If we don‟t start________ energy now, it will be too late. 
 A. doing B. making C. giving D. saving 
4. Commonly,_____ is used for lighting in modern societies. 
 A. water B. electricity C. oil D. wood 
5. In Viet Nam, electricity is mainly produced from________ 
 A. gas B. oil C. heat D. water 
6. In modern societies, gas, water and electricity are________ 
 A. money B. necessities C. unnecessary D. luxuries 
7. Nowadays, people are thinking of________ energy as an alternative. 
A. solar B. sun C. lunar D. moon 
8. Everybody should put different kind of_____ in different places. 
 A. power B. energy C. fuel D. waste 
9. I‟m _________________ that most of us have spoiled this area. 
 A. disappoint B. disappointing C. disappointed D. disappointedly 
10. You‟d better buy this kind of _____________________ bulb to save the power. 
A. energy-saving B saving-energy C. power-saving D. saving-power 
 11. I suggest having a(n) ____________ check the pipes in our house. 
 A. mechanic B. engineer C. plumber D. worker 
12. We should use public buses .. of motorbikes. 
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 A. because B. in spite C. instead D. out 
13. How can people get energy from the sun? 
They install .......... on the roofs of the house to receive energy from the sun. 
A. lamps B. bulbs C. panels D. picture 
14. Can you turn . the television ? - I want to watch the news program 
A. on B. off C. in D. at 
15. She isn't VietNamese ............., she speaks Vietnamese perfectly. 
A. So B. However C. And D. or 
III. Give the correct form of the verbs in brackets to complete the following sentences. 
1.I (know) .. her for several years, but I never (like)  her very much. 
2. Linda (forget) . to bring her guitar yesterday. I (be) .sure she (forget) 
.. about it tomorrow, too 
3. My brother (like) .to collect stamps. He (have)  a big collection. He often 
(exchange ).. stamps with his friends. 
IV. Read the following passage and then choose the correct answer A, B, C or D. 
One of the most important discoveries of the nineteenth century was a method of using natural gas for 
cooking and heating. Large amounts of natural gas are found in the United States, usually several feet below 
the surface of the earth. Natural gas is most often found in places where petroleum, the oil from which 
gasoline is made, is found. Often the natural gas must be removed before the oil itself can be reached. 
For many years after natural gas was first discovered, it was thought to have no value. Finally, 
however, people began to understand its use and to find ways of storing it and moving it from place to place. 
Today natural gas is stored in large tanks and used for lighting, cooking and heating. It has also been used for 
electric generators and hybrid cars recently. In many ways natural gas is one of our finest fuels. It can be used 
for cooking without making the room hot. It is cheap and can be moved easily from one place to another 
through long pipelines, some of which are hundreds of miles in length. 
1. It can be inferred from the passage that ________. 
 A. natural gas is useless 
 B. people once wasted natural gas 
 C. natural gas is moved in trucks 
 D. natural gas is found where there is no petroleum 
2. This passage as a whole is about ________. 
 A. discovering natural gas B. finding petroleum 
 C. using natural gas and petroleum D. natural gas and its use 
3. Which of the following is NOT true about natural gas? 
 A. It is not used for heating. B. It moves through pipes. 
 C. It is cheap. D. It can be stored. 
4. According to the passage, the easiest way to move natural gas from one place to another is ________. 
 A. to liquidize it and move it through pipelines. 
 B. to liquidize it and move it by trucks. 
 C. through pipelines. 
 D. to store it in large tanks to move. 
5. How many uses of natural gas are mentioned? 
 A. two B. three C. four D. five 
V. Read the following passage then answer the questions. 
Solar technologies use the sun‟s energy and light to provide heat, light, hot water, electricity and 
even cooling for homes, businesses, and industry. Solar is a good energy option in developing countries. 
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Because of the cost of transmission lines and the difficulty of transporting fuel to remote areas, developing 
countries are increasingly turning to solar energy as a low cost way to supply electricity. With a third of 
the world‟s population still without electricity, most of whom live in developing countries; usage of solar 
panels will be increasing greatly as the demand for electricity spread throughout the world. There are 
actually more solar panels and big solar plants being used today than ever before. However, solar power 
has clearly not met its full potential. It‟s still expensive to get the solar power system. In order for 
widespread generation of electricity using solar panels to be feasible it needs to be economically 
advantageous. Production costs must go down so that solar panels will be an economically viable choice 
for the production of electricity. 
Questions: 
1. What do solar technologies use the sun‟s energy and light for? 
2. Why hasn‟t solar power met its full potential? 
. 
3. Where is solar power from? 
. 
4. How do people do to widespread generation of electricity using solar panels to be feasible? 
.. 
5. Why is solar a good energy option in developing countries? 
.. 
VI. Read the advertisement and then decide whether the statements that follow are True or False. 
Energy is very important in modern life. People use energy to run machines, heat and cool their 
homes, cook, give light, transport people and products from place to place. Most energy nowadays 
comes from fossil fuels-petroleum, coal, and natural gas. However, burning fossil fuels causes pollution. 
Also, if we don‟t find new kinds of energy, we will use up all the fossil fuels in the twenty-first century. 
Scientists are working to find other kinds of energy for the future. What might these sources of energy 
be? 
1. Energy is collected for use in their homes. _____________ 
2. We burn coal to produce electricity _____________ 
3. Air pollution comes from the burning of fossil fuels. _____________ 
4. Scientists aren‟t doing research into alternative energy sources. _____________ 
UNIT 8: CELEBRATIONS 
I. Choose the best answers A,B,C, or D. 
1. Luck money______ is hoped to bring about luck is given to children during Tet holidays. 
 A who B. whom C. which D. whose 
2. Children________ are good at home and in school will receive presents from Santa Claus. 
 A. who B. whom C. which D. whose 
3. ________ there is no official day for mothers and fathers in Viet Nam , people always think of their 
parents. 
 A. Although B. Because C. However D. Therefore 
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4. Vietnamese people always spend time tidying and rearranging their houses for Tet holidays______ they 
are quite busy at work. 
 A. however B. because C. even though D. therefore 
5. Did you enjoy the year- end party____ last night? 
 A. which you attend B. which you attended 
 C. who you attended D. who you attended with 
6. Jingle Bells is the song________ during Christmas season. 
 A. who people sing B. which people sing 
 C. which sing D. who sing 
7. Adults celebrate Mid-Autumn Tet_________ it is often thought as a festival for children only. 
 A. because B. although C. however D. therefore 
8. My father is always the first person_________ says Happy New Year to all family members on the fist 
day of Tet holidays. 
 A. who B. which C. whom D. whose 
9. Tornadoes can suck up things _______ are in their path. 
A. who B. that C. where D. which 
10. The huge earthquake _____ struck the city of Kobe in Japan killed a large number of people. 
A. who B. which C. where D. whom 
11. Let me see all the letters _______ you have written. 
 A. that B. which C. who D. whom 
12. Is there any one ________ can help me do this? 
 A. whom B. that C. whose D. who 
13. Love, ________ is a wonderful feeling, comes to everyone at some time in his life. 
 A. who B. that C. which D. whom 
14. We are going _______ the anniversary of our 50
th
 wedding. 
A. to celebrate B. celebrated C. celebrating D. celebrate 
15. What activities do you want to _______ in that school and at the club? 
A. taking part in B. taken part in C. take part D. took part in 
16. It„s very nice _______ you to say so. 
A. in B. on C. of D. to 
17. Passover is celebrated in Israel and by all _______people. 
A. English B. Vietnamese C. Jewish D. Chinese 
18. . he is very old, Mr. Brown goes jogging every day. 
A. Although B. Despite C. In spite D. However 
19. Miss White, _________we are studying English with, is a very nice teacher. 
A. who B. whom C. that D. Both A and B. 
20. I‟d like to go on holiday in spring _________there are flowers everywhere. 
A. when B. which C. where D .that 
II. Read the following passage and answer the questions. 
THE MID-AUTUMN FESTIVAL 
 In Viet Nam, the Mid-Autumn festival is also called the Children‟s festival because it includes 
special activities for them. It is held every year on the 15
th
 of the 8
th
 lunar month when the moon is the 
brightest and roundest. 
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About one month before the festival, a lot of stalls are built along the streets selling moon cakes 
and displaying a variety of lanterns in different sizes and shapes. Lanterns are made of red cellophane-
transparent paper and bamboo sticks or of plastic and thin steel wire. Most of them are traditionally lit up 
with candles though some have battery-operated lamps. 
There are a lot of interesting activities in the Mid-Autumn festival such as the children‟s lantern 
procession and the Unicorn dance performance-Unicorn is an imaginary animal which looks like a lion. 
These activities are usually performed in the evening 
Children and their parents assemble in the garden, in the backyard, on the terrace of their house, or 
even on the pavement where they can have a good view of the moon and enjoy the performances. They 
also celebrate the festival with moon cakes while watching the full moon rising. The festival ends up 
around midnight when the moon is at its highest position in the sky. 
Questions: 
1. Why is the Mid-Autumn festival also called the Children‟s festival? 
 ________________________________________________________________ 
2. When is the Mid-Autumn festival celebrated every year? 
 ________________________________________________________________ 
3. What do stalls along the streets sell and display before the Mid – Autumn festival? 
 ________________________________________________________________ 
4. List some activities in the Mid-Autumn festival. 
 ________________________________________________________________ 
5. When does the festival end up? 
 ________________________________________________________________ 
III. Read the passage and fill in each gap with a suitable word from the box. 
With Top Bought Friends 
Put Under On Hand 
Christmas is the biggest festival of the year in most of Britain. Celebrations start properly (1)24 
December, Christmas Eve, although there have been several weeks of preparation before 
(2)..the Christmas trees and all the presents, food, drinks and decorations have been 
(3)... Christmas cards have already been sent to (4).and relations. About a week before 
Christmas, people usually (5).up their decorations and decorate the Christmas tree 
(6)lights, various colored decorations and an angel on the(7)... . Family presents are 
usually put (8)..the tree. 
IV. Read the passage. Then choose the best option (A, B, C, or D) to complete the sentences. 
Tet or Lunar New Year is the main holiday for Vietnamese people. It is the most important 
celebration in the year which sometimes occurs between January 19 and February 20. Tet marks the 
beginning of spring and it‟s a time for family members who live apart try to be together. The preparations 
and celebrations used to be spread over months but nowadays the holiday is much shorter. However, there 
is great excitement building up well before Tet. Streets are decorated with colored lights and red banners. 
Shops are full of goods. People buy gifts, clean and decorate their houses and cook traditional foods. 
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On the first days of Tet, people try to be nice and polite to others. They visit their relatives or friends 
and exchange New Year‟s wishes. Children receive the “lucky money” inside red envelopes. Many people 
go to the pagoda to pray for a happy new year for themselves and their family. Tet is really a time of fun 
and festivals throughout the country. 
* Questions: 
1. When is the Tet holiday in Vietnam? 
2. What are streets decorated with? 
............................................................................................................................................................... 
3. What do Vietnamese people often do to prepare for the Tet? 
................................................................................................................................................................ 
4. Do people try to be nice and polite to others on New Years‟s Days? 
................................................................................................................................................................ 
5. Why do people go to the pagoda? 
................................................................................................................................................................ 
V. Rewrite these sentences begin with the words given. 
1. We went swimming in spite of the heavy rain. 
 Although it rained.. 
2. She doesn‟t study harder, so she fails the exam. 
 If she 
 3. The Notre Dame in Saigon built by the French is the cathedral. 
 The Notre Dame in Saigon, which. 
VI. Read the passage below and then choose the correct answer A, B, C or D. 
In Viet Nam, there is great excitement built up well before Tet Nguyen Dan. First, every family 
organizes a trip to the cemetery to visit the graves of their ancestor. After that, to create an air of 
prosperity, wealth and fun for the first three days of the Lunar New Year, people are kept busy cooking 
traditional foods, buying gifts, and making other preparations. Certain items deemed to be bought or made 
are banh chung, dried watermelon seeds, tea, dried sausages, fruit (fresh and candied), ornamental plants 
and flowers. Red and yellow flowers are ideal as they make the house more welcoming. On the New 
Year's days, only good comments and wishes can be expressed. Children receive their Ii xi (or red 
envelopes with lucky money inside). People make a visit to family members, neighbors, and close friends. 
And people who live apart from their family try to get together on these days. Clearly enough, games and 
various forms of entertainment are staged and these often last a week. Varying traditional specialties 
including wrestling, buffalo fighting, dragon dancing take place in different regions. 
1. Before Tet, people usually _________. 
 A. are very busy with the preparations B. have great excitement and fun 
 C. rebuild their ancestral graves D. spend time on traveling 
2. Which of the following, according to the passage, is NOT usually eaten during Tet? 
 A. candied fruit B. sausages C. watermelon D. beef stew 
3. Why are red and yellow flowers popular in decorating the house at Tet? 
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 A. Because they are pleasant and cheap. B. Because they make the house look comfortable to be in. 
 C. Because they represent good luck. D. Because they are attractive and not very expensive. 
4. On the New Year's days, _________. 
 A. people are busy cooking traditional foods B. everybody receives their “lucky money” 
 C. only good comments can be made D. houses are cleaned and decorated with trees and flowers 
5. Which of the following is NOT mentioned in the passage? 
 A. Tet is period of concord and hope. B. Tet is an occasion for a family to get together. 
 C. Tet is a good time to visit others. D. Tet is a great season of joy and of entertainment. 
VII. Read the paragraph. Then choose the best answer for each question. 
Christmas 
 Two popular traditions at Christmas are: decorating the home and singing the Christmas carols. The 
home is the center of the Christmas celebration. Inside, an evergreen tree is usually placed in the corner of 
the Living room. Children and their parents wrap string of colorful lights around the tree, they hang 
ornaments on the branches. A star or angle often crowns the top. Careful- wrapped gifts are placed 
beneath. Outside, families often string lights around the windows and wind light around trees and shrubs 
in the front yard. As the families decorate their homes, they often put on Christmas record. Almost every 
family has at least one favorite album or compact disc. School children of all ages perform Christmas 
concerts for their parents and communities. On Christmas‟ Eve, family members gather around Christmas 
tree to sing traditional songs Such as Jingle bells and Silent night and then give presents to each other. 
1- What are the popular traditions at Christmas? 
a) Decorating the home. b) Singing Christmas carols. 
c) Eating Christmas pudding. d) a and b are correct. 
2- Where is the evergreen put? 
a) In the middle of the living room. c) In the middle of the bedroom. 
b) In the corner of the living room. d) In the corner of the bedroom. 
3- How do they decorate the Christmas tree? 
a) They wrap string of colorful lights around the tree. c) They crown a star on the top. 
b) They hang ornaments on branches d) a, b and c are correct. 
4- What do the family members often do on Christmas’ Eve? 
a) They gather around Christmas tree. 
b) They sing traditional songs. 
c) They gather around the tree, sing traditional song and get presents 
d) They give presents to each other. 
5- What do they do as they decorate their home? 
a) They sing traditional songs. c) They eat Christmas pudding. 
b) They put on Christmas record. d) a, b and c are correct. 
VIII. Choose A, B, C or D to complete the following sentences 
1. Last night we came to the show late ____ the traffic was terrible 
A. although B. despite C. and D. because 
2. I lived in Dalat, ____ is one of the most beautiful cities of Vietnam 
A. who B. which C. whom D. whose 
3. The people ____ live in Greece speak Greek 
A. which B. whom C. where D. who 
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4. Auld Lang Syne is a song ____ is sung on New Year‟s Eve 
A. which B. whom C. who D. when 
5. Peter, ____ can compose many pieces of music, sings very well 
A. which B. whom C. who D. whose 
6. ____ he likes chocolate, he tries not to eat it 
A. As B. Though C. Since D. Despite 
7. Do you know the man ____ you met yesterday? 
A. who B. whom C. which D. whose 
8. The men and animals ____ you saw on TV were from China 
A. who B. whom C. which D. that 
9. Tet is a festival ____ occurs in late January or early February 
A. who B. which C. whom D. when 
10. The car ____ he has just bought is very expensive 
A. who B. whom C. which D. whose 
UNIT 9: NATURAL DISASTERS 
I. Choose the best answers A, B, C or D. 
CAUSES OF FLOODS 
 When it rains or snows, some of the water is (1).by the soil, some is absorbed by 
vegetation, some evaporates, and the remainder, which (2)stream channels, is called run