小题1:C
小题2:A
小题3:B
小题4:A
小题5:D
小题1:根据文章内容The students were having their chemistry class. Miss Li was telling the children what water was like.可知答案为C
小题2:根据文章内容Miss Li was telling the children what water was like.可知答案为A
小题3:根据文章内容The water in the river behind my house is always black and it has a bad smell.可知答案为B
小题4:根据文章内容Most of the children agreed with him.可知答案为A
小题5:根据文章内容“I’m sorry, children,” said the teacher. “Our water is getting dirtier and dirtier. That’s a problem.”可知答案为D