1. I hope, when you finished this exercise, you____many mistakes in it.

A. won’t make

B. won’t have made

C. won’t be making

D. won’t have been making

2. ____he arrived at the airport, he realized what had happened there.

A. The moment when

B. The moment

C. Until

D. At the moment

3. Water is to fish____atmosphere is to men.

A. that B. so C. what D. so does

4. I’m sure your suggestion will____the problem.

A. contribute to solve

B. be contributed to solve

C. be contributed to solving

D. contribute to solving

5. That our environment has little to do with our abilities, characters and behavior____central to his theory.

A. is

B. are

C. has been

D. have been

答案及解析： BBCDA

1.【B】时态问题。根据句意，主句的动作应在将来某一动作完成时完成，只有只有B的将来完成时较恰当。

2.【B】the moment这里做连词用，表示“就在……时，就在……的那一刻”，前面不需要加介词，如: Thunderous applause broke forth the moment the pop star appeared on the stage.

3.【C】A is to B what C is to D是固定结构，表示“A与B的关系就像C与D的关系一样。”

4.【D】contribute表示“有助于，促成”时，搭配是contribute to doing sth.

5.【A】主谓一致。本句的主语是一个主语从句，即that our environment…behavior,所以应用单数;另外，本句只是表达一般陈述，故用一般现在时即可。