I- Join each of the following pairs of sentences with “or” , “and” , “but” , “so” or “because”
1- I told a joke. Nobody laughed.
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2- You must study harder. you will go into another class.
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3- The city suffers from air pollution. The city suffers from water pollution.
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4- I knew her family. I did what I could for her.
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5- We can’t afford energy-saving light bulbs. The light bulbs are too expensive.
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VII- Choose the correct connectives in brackets :
1. I opened the door ....................................................... looked out. (and / but)
2. She’s working late today..............she can’t come to the party. (so/ because)
3. Nam’s bike was broken......................he borrowed mine. (so / because)
4. The air is polluted.........................there’s too much traffic. (Therefore / because)
5. We looked everywhere. ............, we could not find the keys. (However / Therefore)
6. Minh tried to read the book..................... he couldn’t understand it. (but / or)
7. The bus fare is expensive. ............................., I prefer to walk. (However / Therefore)
8. The road was under water. ......................, the police closed it to traffic. (Therefore / so)
9. There were many people at the concert, .................. we couldn’t get seats. (so / however)
10.We haven’t got a car...................we’ve got a motorbike. (and / but)
11.I read the book, .................................. did not understand it. (but / or)
12.Which color do you want blue, red, yellow, ..................... grey? (or / so)
13.We had to wait ..................................................... we arrived early. (because / so)
14.They went to Africa.......... they wanted to study the wild animals. (so / because)
15.I would like to go swimming. ......., I have too much work to do. (However / Therefore)
16.I go for a walk ............................. the sun is shining. (because / so)
17.They went to town.......................... bought a lot of clothes. (and / so)
18.Nam isn’t English........................., he speaks English perfectly. (Therefore / However)
19.Do you know his address ......................... telephone number ? (but / or)

atmosphere. Doctors have proved that air pollution causes lung diseases. The gases from the exhausts of cars have
also increased air pollution in most cities. The lead in petrol produces a poisonous gas, which is often collected in
busy steets circled by high buildings. Children who live in areas where there is a lot of lead in the atmosphere
cannot think as quickly as other children, and are clumsy when they use their hands.
*Questions
1. What does the air pollution cause?
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2. Who has proved that air pollution causes lung diseases?
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3. Is there air pollution in the city? Why or why not?
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4. What happens to the children who live in areas where there is a lot of lead in the atmosphere?
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D/ Writing. Complete the following sentences with the suggested words:
1- Good evening / Lady / Gentleman. My name / I / tell / how / reduce / save money.
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2- Every household / use / much electricity. You / reduce / amount by :
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3- Turn off / lights / before / go out.
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4- Prepare / food / carefully / before / turn on / stove.
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5- Keep / refrigerator door closed.
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8- If/ follow/ simple rules/ not only/ you/ save money/ but also/ you/ conserve/ natural resources
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