15.The professor could hardly find necessary grounds_______his arguments in favour of the new theory.

A.to be based on　　　　　　　　　　　　　　　　 B.to base on

C.which to base on　　　　　　　　　　　　　　　 D.on which to base

解析：句意：这位教授几乎不可能找到必需的理由，以此来支持新学说。

本题考查定语从句和base 一词的用法。固定短语：base sth on sth。

原句剖析：The professor could hardly find necessary grounds( on which to base his arguments) in favour of the new theory.划线部分为定语从句，正常语序应该是which he base his arguments on介词提前可以得到on which he base his arguments ，大家都知道宾语从句中what to do=what we should do ，类比可得，此句可改成on which to base his arguments

答案：D

25. He had a lot of friends, none of _____ could lend him any money.

　A. whom　　　 B. them　　 C. which　　 D. who

解析： none of whom could ...为非限制性定语从句

答案A

拓展：对比：He had a lot of friends, but none of _____ could lend him any money.

　A. whom　　 B. them　 C. which　 D. who

此题选B，由于句中有并列连词 but，整个句子为并列句，因此选them

He wrote a lot of novels, none of _____ translated into a foreign language.

　A. them　 B. which C . it　 D. what　

同学们看了上面一题的分析后，也许会毫不犹豫地认为此题应选 B，理由是none前没有并

列连词 and或 but，但这次又错了。此题的最佳选项应是A，注意此句与上面一句有着本

质的不同，即此句的 translated不是谓语，而是一个非谓语动词(过去分词)，所以逗号

后面其实不是一个完整的句子，而是一个独立结构。假若在 translated前加一个助动词 w

as，则此题应选(which)，构成一个非限制性定语从句。所以做这类题要特别小心，千万

不要想当然，更不要受思维定势的影响。　

24. He ran as fast as he could _____ to catch the bus.　

　A. hope　　 B. to hope　　 C. hoping　 D. hoped

解析：此题的最佳答案不是B，而是C，其中的现在分词短语hoping to catch the bus用做伴随状语，即一边跑一边希望能赶上汽车。但是，如果选B，将to hope to catch the bus视为目的状语行不行呢？不行。因为“他拼命地跑”目的是“为了赶上公共汽车”，而不是“为了希望赶上公共汽车”，换句话说，将“希望”作为“目的”不妥。因为同样的原因，

答案：C

拓展：下面一题也应选hoping：He studied as hard as he could _____ to enter a good college.　

　A. hope　 B. to hope　 C. hoping　 D. hoped　

23. I’d try even if I may fail _____ sit there worrying in time of trouble.

　　 A. rather than　　 B. other than　　　 C. more than　　 D. less than

解析：考查than短语。rather than：而不是。

答案：A

22. -Ms Lin looks rather a kind lady.　 -But in fact she is cold and hard on us. You ____believe it!

A. shouldn’t　 B. wouldn’t　 C. mustn’t　　 D.needn’t

解析：本题主要考查情态动词的意义和用法。选项A表示建议；选项B表示推测；选项C表示禁止；选项D表示需求。根据句子的意思，本题正确答案为B。

答案B

21. I have no dreams ____ to have a happy life.

A. rather than　 B. more than　 C. other than　　 D. less than

解析：other than的意思是除了而rather than的意思是而不是

答案C

20.-What do you think of the concert?　 -I really enjoy it. I didn’t expect it was ____ wonderful.

A. as　　 B. more　　 C. most　　 D.very

解析：这是一个省略句，承接上文，省略了as I had thought。

答案：A

19. He was sentenced to death ______ what he has stolen from the bank.

A. that　　 B. since　 C. because　　 D. because of

解析：what he has stolen from the bank是名词性从句，所以应该用介词because of

答案：D

18. ______ nice，the food was all eaten up soon.

A. Tasting　 B. Taste 　C. Tasted　　 D. To taste

解析：taste是系动词,没有被动语态

答案：A(表示原因)

拓展：对比：

____ nice, the food should be made by adding more sugar. 此题应选D，表示条件。

17. - How long have you been here？ - ______ the end of last month，

A. In　　 B. By　　 C. At　　 D. Since

解析：since引导的介词短语和现在完成时连用

答案：D