语法练习

1.My cat would not have bitten the toy fish, ___ it was made of rubber.

A.if she has known
B.she should have known
C.if she knew

D.had she known

2.___ are inert outside living cells, but within the appropriate cells they can replicate,causing viral diseases in the organism.

A.Viruses
B.That viruses
C.Viruses, which

D.Despite viruses

3.___ your body does after the stimulus has acted is called the response.

A.When
B.How
C.What

D.That

4.___, astronomy is a field in which amateurs can make significant contributions.

A.Not only most other sciences
B.In most other sciences
C.However most other sciences

D.Unlike most other sciences

5.Take your handbag and hang it ___ you can find enough space.

A.which
B.in which
C.wherever
D.whether

答案详解

1.[D]【解析】在虚拟语气的条件状语从句中，连词if可以省略，这时要把were/had/should提到从句主语前面进行倒装。

2.[A]【解析】根据句中的but判断，本句为并列句，空处所缺为前一句的主语。

3.[C]【解析】what引导主语从句并在从句中作宾语。

4.[D]【解析】unlike引导介词短语，意为“不象……”。

5.[C]【解析】连接副词wherever意为“在任何地方”。