The tudent were having their chemistry（化学）cla . Mi Li wa telling the childre what water wa like. After that, he asked her tudents,
“What' water?”No one oke for a few minutes．Mi Li asked again，“Why don't you a wer my question？Didn't I tell you what water i like？”

Just the a oy ut u hi hand and aid，“Mi Li，you told u that water ha o colour and o mell．But where to find uch kind of water？The water i the river ehind my house i alway lack and it ha a ad mell．”Most of the childre agreed With him．

“I'm orry，children．”said the teacher，“Our water i getting dirtier and dirtier．That' a roblem．

1．The tudent were having their _______ cla ．

A．English ．Chinese C．chemistry D．math

2．Mi Li wa telling the childre what ______ wa like．

A．water ．air C．earth D．weather

3．A oy aid，“The water i the river ehind my house i alway _______．”

A．white ．black C．clea D．clear

4．Most of the childre _______ the oy．

A．agreed with ．wrote to

C．heard from D．sent for

5．The water i the river ha colour and mell ecause it i getting _______．

A．more and more ．le and le

C．cleaner and cleaner D．dirtier and dirtier

KEY: 1．C 2．A 3． 4．A 5．D