46. We were not surprised at _____, for he had worked so hard.
　A. what has he achieved　　B. that what he had achieved　　
C. what he had achieved    D. that he had achieved
答案：C。宾语从句要用陈述句的语序，what在从句中做宾语，所以选C。

47. My room is a mess. It needs _____.
　A. to be tidying up　　B. tidying up　　C. to tidy up　　D. tidied up
答案：B。句型：主语（物）+need（want，request）+doing（to be done），后面用动名词的主动形式来表示被动含义或不定式的被动形式来表示。The house needs cleaning.（to be cleaned）：这房子需要打扫了。The radio needs repairing（to be repaired）.这台收音机需要修理了。

48. A great celebration is going to be held _____ the distinguished writer.
　A. in spite of　　B. in honor of　　C. in favor of　　D. in the name of
答案B。in honor of：为了纪念…。本句的意思是“为了纪念这位杰出的作家,准备举行一个庆祝会。”因此只有B最符合题意。in spite of …尽管…in favor of：赞成…。in the name of用…名义，代表…

49. All the members in the jury agreed that the man was _____ of theft.
　A. criminal　　B. charged　　C. guilty　　D. faulty
答案：C。be guilty of：有罪的，有过失的。be found guilty of murder被判犯有谋杀罪。因此C最符合题意。Charge：（动词）控告，指责charge sb with murder指控某人犯谋杀罪。criminal（名词）罪犯，faulty：有错误的，有缺点的。

50. Having finished the letter, he ____ it carefully and sealed the envelop with a kiss.
　A. folded　　B. bent　　C. turned　　D. equipped
答案：A。fold：折叠，对折。fold a blanket（letter）：折毯子（信）本句的意思是“他写完信，小心地叠起来，用舌头舔了一下封上口。”因此A最符合题意。Bent：弯曲的；turn：旋转。equip：装备。

51. The police were given an order that the stolen documents must be recovered at all ___
　A. accounts　　B. conditions　　C. payments　　D. costs
答案：D。at all costs:不惜任何代价，无论如何。account 一般常用：on all accounts：无论如何；conditions 和payments都不和at搭配。

52. This new instrument is far superior _____ the old one we bought three years ago.
　A. than　　B. to　　C. over　　D. of
答案：B。be superior to…，地位高于…品质优于…This engine is superior in every respect to that one .这台发动机在很多方面比那台好。

53. Not until I reminded him for the third time _____ working and looked up.
　A. that he stopped　　B. does he stopped　　C. did he stop　　D. that he stopped
答案：C。not until放在句首，句子倒装。Not until he finished his homework did Li Ming watch TV.李明做完作业后才看电视。

54. I am very sorry for _____ for so long.
　A. keep you waiting　B. having kept you waiting　C. waiting for you　D. keep you wait
答案：B。介词后面要跟动名词做宾语，当动名词的动作在谓语动词所表示的动作之前发生时，要用动名词的完成式。Thank you for having helped me so much.感谢你给了我这么多的帮助。

55. No sooner had they got off the train _____ it started moving.
　A. when　　B. than　　C. then　　D. after
答案：B。no sooner…..than…：一…就…；hardly…when…：一…就…；scarcely…when…：一…就…。No sooner had I lain down than the telephone rang.我刚躺下，电话铃就响了。Scarcely had the baby cried when the nurse rushed to carry him.婴儿一哭保姆就赶快去抱他。本句的意思是：“他们刚把货物盖好，就开始下雨了。”