4. -What would you wish to do if you were a college student again?

　 -That's very hard to say, but I wish I 　　　　when I was a college student. [陕西省宝鸡市2010届期末统考][虚拟语气]

A. has not studied biology　　　　　 B. did study biology

C. had studied biology　　　　　　　 D. studied biology

[答案]C

[解析]本题考查wish后接宾词从句的用法。Wish后接宾词从句，从句的谓语动词要用虚拟语气，因为题干提示与过去事实相反，故用had done

3.-I promise her daughter she 　　　　　　　　　　　　 get a nice present on her birthday.

_{一Will it be a surprise to her?} [湖南省雅礼中学2010四次月考][情态动词]

A. 　should　　　　　　　　　　　　 B. 　must　　　　　　　　　 C. 　would　　　　　　　　　 D. 　shall

_[答案]D

_{[解析]情态动词shall用于二、三人称表示说话者的意图，允诺或警告，此处表许诺。故选D。}

2. -What do you think of your nephew? ※[陕西省宝鸡市2010届期末统考][情态动词];

　 -He__________ be very naughty but at the same time you poor.

A. will ; will　　　　　　　　 B. won't; can't　　

C. may ; may　　　　　　　　 D. can; can't

[答案]D

[解析]本题考查情态动词的用法，前一空填“可能”含义的情态动词，排除A、B。后一空为惯用法，can't help doing是禁不住干某事。

1．These achievements_______ without the contribution of Qian Xuesen, a key leader of the New China's nuclear, missile and so on．[安徽省三名校2010届期末联考][虚拟语气]

　　　 A．would have been unthinkable 　　　 B．would not be unthinkable

　　　 C．would be unthinkable　　　 D．would not have been unthinkable

[答案]A

[解析]本题考查虚拟语气。题干句子中“without the contribution of Qian Xuesen”表示与过去事实相反的虚拟语气，谓语动词要用“would not lave done'’。