19. It’s uncertain__________.

A. why did he do it　 B. why does he do it

C. when did he do it　 D. whether he did it or not

答：D。uncertam不确信

　　 don’t question

18. It is generally considered unwise to give child________he or she wants.

A. however　 　B. whatever　

C. whichever　 　D. whenever

答：B。whatever　 凡是，所……的一切

　　 am not sure

　　 question

　　 am sure

22. He felt unhappy for _______ to the party.

A. not his being invited　 B. his not being invited

C. his being not invited 　D. his not to be invited

答：B。动名词的否定式是“not+-ing”构成，his not being invited为带逻辑主语的动名词结构。

21. __________ enough time. we didn’t finish the work.

A. Not there being　 　　B. There being not

C. There not being　 　　D. There wasn’t

答：C．分词傲状语相当于状语从句，there be句型的分词形式为therebeing，其否定式为there not 　being．D项没有连词，不成立。

20. One cannot be too careful. Make as __________ mistakes as you can.

A. few　 B. much　　　 C. many　 D. little

答：A．cannot be too...或can never be too... 表示“越……越好”。第一句意为“一个人越仔细(认真)越好”．mistake为可数，应用few修饰。

19. Would you give me a hand? The box is 　_____ heavy.

A. too　　 B. so　 　C. hardly　 D. to much

答：A．此句相当于The box is too heavy for me to carry, too...to...句式表示“太……以至于不……“。如：The child is too young to go to school. 孩子太小，还不能上学。

18. He arranged for me to meet Professor Wang at the airport, but I failed_______him.

A. meet　　 　　B. meeting　

C. to meet　　　 D. having met

答：C．failtod。投能做成某事，是用肯定形式表示否定意义的句式。

17. He would rather ________ than _________.

A. to die, to give in　　　　 B. die, give in

C. to die, give in　　　　　 D. die, to give in

答：B。would rather...than...宁愿……而不……，后接动词原形。than引导的从句用肯定形式来表示否定意义。

16. -How many students are there in the reading-roomy?

-__________.

　 A. Only few 　　　B. No one　

　 C. None　　 　　　D. Nothing

答：C。None常用来回答就不可数名词或可数名词复数提问的句子，no one用来回答针对可数名词单数提问的句子。如：

-Who is in the reading-room? -No one.