一、根据首字母提示填空。
1. We should k the school clean.
2. Your coat is d. Please take it off and wash it.
3. Beijing is a big c in China.
4. The rubbish made the streets m.
5. Let's go out to get some fresh a.

二、用所给词的适当形式填空。
1. The fish in the river ______ (be) dead many years ago.
2. Look at ______ (this) pictures of the classroom. They are nice.
3. Who ______ (make) the streets clean every morning?
4. (苏州常熟)To recycle(回收利用) things, we can ______ (put) rubbish in different bins.

() 1.— ______ can we do to make the air clean?
— We can plant more trees and take the bus.
A.Where
B.What
C.Who
D.How

() 2.— Who ______ the kitchen dirty? — My brother ______.
A.make; does
B.made; does
C.made; did
D.is making; did

() 3.Smoke ______ factories made the air dirty.
A.with
B.to
C.from
D.for

( ) 4.Su Hai and Su Yang usually walk after school.
A.to home
B.home
C.to school
D.school

( ) 5.— How the river is! — Yes, I can see many fish in it.
A.dirty
B.clean
C.messy
D.black

四、从方框中选择合适的句子补全对话,有一项多余。
Eric: What did you do last Mid - Autumn Festival?
Bob: 1. They live in the countryside.
Eric: What was it like before?
Bob: There were lots of factories. 2.
Eric: How is there now?
Bob: It is so nice. A small river is near our house. 3.
Eric: That is great fun. 4.
Bob: Yes, I will. The river is clean. There are many fish in the river.
Eric: 5.
Bob: Yes. If we protect the environment now, the countryside will be better.
A. I went fishing with my dad.
B. Will you go fishing this Mid - Autumn Festival?
C. The countryside changed a lot.
D. I visited my grandparents.
E. There were many cars too.
F. There were a lot of trees.