学进去

Read and choose.（阅读短文，选择正确的答案）
The students were having their chemistry (化学) class. Miss Li was telling the students what water was like. After that, she asked her students, “What’s water?” No one answered. Miss Li asked again, “Why don’t you answer my question? Didn’t I tell you what water is like?”
Just then a boy put up his hand and said, “Miss Li, you told us that water has no colour and no smell. But where to find such kind of water? The water in the river behind my house is always black and it has a bad smell.” Most of the students agreed with him.
“I’m sorry, children,” said Miss Li. “Our water is getting dirtier and dirtier (越来越脏). That’s a problem.”
1．The students were having their ________ class. （   ）

A．English

B．Chinese

C．chemistry

D．math

2．Miss Li was telling the students what ________ was like. （   ）

A．water

B．air

C．earth

D．weather

3．A boy said, “The water in the river behind my house is always ________.” （   ）

A．white

B．black

C．clean

D．clear

4．Most of the students ________ the boy. （   ）

A．agreed with

B．wrote to

C．heard from

D．sent for

5．The water in the river has colour and smell because it is getting ________.（   ）

A．more and more	B．less and less
C．cleaner and cleaner	D．dirtier and dirtier