Unit 3 Computers Learning about language课时作业

第一节　单项填空(共15小题；每小题1分，满分15分)

　　请阅读下面各题，从题中所给的A、B、C、D四个选项中，选出最佳选项。

1．_____________ his parents' advice，he____________ having made such a silly mistake now.

A．He had taken；would not regret

B．Had he taken；would not regret

C．He had taken；would not have regretted

D．Had he had taken；would not have regretted

答案　B

解析　句意为：如果他听取了父母的建议，他现在就不会犯如此愚蠢的错误。if从句与过去相反用过去完成时，省略if后，将had提前。主句有提示词now，表示与现在相反，用would＋动词原形。根据句意可知选B。

2．-Don't worry，Mum. The doctor said it was only the flu.

-___________ ！I'll tell dad there's nothing serious.

A．Congratulations B．What a relief

C．How surprising D．I'm so sorry

答案　B

解析　Congratulations恭喜，祝贺；What a relief那我就轻松多了；How surprising多么惊喜；I'm so sorry我感到非常抱歉。句意为：--不要担心，妈妈，医生说这只是流感。--那我就轻松多了！我会告诉爸爸这并不严重。故选B项。

3．_________ some teenagers don't realize is _______ difficult life can be after they get addicted to drugs.

A．What；how B．That；how

C．What；what a D．That；what

答案　A

解析　句意为：一些青少年没有意识到的是，他们染上毒瘾后生活会是多么艰难。第一空引导主语从句，且从句中缺宾语，故用what；第二空修饰形容词difficult，故用how。

4．The British teachers didn't know what Thanksgiving Day was held_____________.

A．in honour of B．in favour of

C．in place of D．in celebration of

答案　D

解析　in honour of向......表示敬意；in favor of支持，赞同；in place of代替；in celebration of庆祝。句意为：英国老师不知道感恩节是庆祝什么的。故选D项。

5．As he has been in a terrible state of mind these days，on no account ________ achieve success