Mike: What can you see in the picture?
Liu Tao: I can see much .
Mike: Where is it from?
Liu Tao: It's from some . It can make the air .
Mike: What can we do to keep the air ?
Liu Tao: We can those factories from the city.
Mike: That's a good idea.

black smoke，factories，dirty，clean，move，away

There are lots of factories in the c. We can often see the black s out of the chimneys(烟囱). It makes the air very d. Some people feel ill. People can't go for a running in the streets in the e morning. Or(否则的话) they will get a bad c. I think we should m these factories away. We should also p more trees.

city，smoke，dirty，early，cough，move，plant

( ) 1. Which of the following is NOT mentioned?
( ) 2. How much time does it take to turn off the radios?
( ) 3. Why can't we waste water according to the passage?
( ) 4. Which of the following is NOT right?
( ) 5. What's the title(标题) for the passage?

1. C
2. C
3. A
4. C
5. B