电子课本网 › 第67页

第67页

信息发布者：

C

A

A

B

B

3

4

1

5

2

dirty

messy

paper

ground

are

bottles

clean

sweep

clean

chairs

help keep the air clean

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

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

dirty, messy, paper, ground, are, bottles, clean, sweep, clean, chairs

上一页下一页