Bµi 3: Chän tõ thÝch hîp trong khung ®iÒn vµo chç trèng.
And
But
So
 Or
Therefore
However

Tom is a careful student … Tom’s brother isn’t.
Mike likes traveling to strange land … her parents like traveling, too.
I thought they planted trees … they cut them down instead.
People want to use cars. …., cars require so much energy to run.
It isn’t very hot, … I turn off the air conditioner.
How does your father go to work? ~ By car … by public transport?
Every form of life requires a constant input of energy. …., we depend heavily on energy for our survival.
Would you like to have a glass of cold water ….you prefer a cup of hot tea?
We don’t have much paper now, … we should try to save it.
During the daytime, we can collect solar power …. what about during the night?
Bµi 4: Chän côm ®éng tõ trong khung ®Ó ®iÒn vµo chç trèng.
Turn off
Turn on
Look for
Look after
Go on

Before leaving the room, remember to … all the lights.
You must … the child carefully because he is playing with all these electric toys.
I often … this small light to learn when I am in my own room.
If there is no one in the room, don’t … the TV.
“What are you doing there?” ~ “I’m … a book on energy uses”.
If you … using hot water for all your machine washes, your electicity bill will be higher.
We can help save energy if we prepare food carefully before … the stove.
Offices should … all the lights during the night.
During the daytime, when the room is light enough, don’t … the lights.
Let’s work together to … a better way to reduce energy uses.
When / room / light / enough, / do / not / turn / lights.
When the room is light enough, turn on the lights.
When the room is light enough, do not turn the lights.
When the room is light enough, do not turn on the lights.
When the room is light enough, do not turn on lights.
I / think / we / turn / light / before / leaving / room.
I think we should turn the light before leaving the room.
I think we should turn off the light before leaving the room.
I think we should turn off light before leaving the room.
I think we should turn off the light before leaving room.
Energy / from / sun / be / clean / cheap / safe.
Energy from sun is clean, cheap and safe.
Energy from the sun is clean, cheap and safe.
Energy from sun is clean, cheap, safe.
Energy from the sun are clean, cheap and safe.
It / necessary / we / build / water tank / store / water.
It’s necessary that we build a water tank to store water.
It’s necessary we build water tank to store water.
It’s necessary that we built a water tank to store water.
It’s necessary that we build water tank to store water.
Bµi 7: Chän ®¸p ¸n ®óng ®Ó hoµn thµnh c¸c c©u sau.
John is clever, ……………. .
A. his borther isn’t B. but his brother isn’t
C. his brother aren’t D. his brother is not
People want to live in the city. However, ……………… .
A. the city was very expensive B. the city is very expensive
C. city is very expensive D. the city are very expensive
It isn’t very hot, ……….. .
A. so I turn off air conditioner. B. so I turn off the air conditioner.
C. so I turns off air the conditioner. D. so I turn off the conditioner.
The weather is very cold, …………. .
A. but he prefers to swim in river. B. but he prefers to swim in the river.
C. but he prefer to swim the in river. D. but he prefers to swim the river.
Would you like ………………….. ?
A. to go by a car or a bus B. go by car or by bus
C. to go by car or bus D. going by car or by bus
John missed the bus. …………………. .
A. Therefore, he was late for interview B. Therefore, he is late for interview
C. Therefore, he was late interview D. Therefore, he was late for the interview
Mr. Ba is very old. …………………. .
However, he have to work hard eight hours a day
However, he has to work hard eight hour a day
However, he has to work hard