51. There are as good fish in the sea __________ ever came out of it.
A. than B. like C. as D. so
【解析】答案选C。 There's as good fish in the sea as ever came out of it. 为英语谚语，其意为：海里的好鱼是取之不尽的。可理解为：纵然失去一个机会，不愁没有其他机会。
52. All the President’s Men __________one of the important books for historians who study the Watergate Scandal.
A. remain B. remains C. remained D. is remaining
【解析】答案选B。All the President’s Men 为书名，故用单数。
53. “You __________ borrow my notes provided you take care of them.” I told my friend.
A. could B. should C. must D. can
【解析】答案选D。 “provided (that) +从句”表示种假设条件，相当于if。根据情况可使用虚拟语气或是陈述语气，这里表示真实的条件句。can表示在此表示许可或同意。
54. If only the patient __________ a different treatment instead of using the antibodies he might still be alive now.
A. had received B. received C. should receive D. were receiving
【解析】答案选A。 if only 引导虚拟语气，与过去事实相反时 if only 谓语动词用had done；与现在事实相反谓语动词用did。(from www.yygrammar.com)
55.Linda was __________ the experiment a month ago but she changed her mind at the last minute.
A. to start B. to have started C. to be starting D. to have been starting
【解析】答案选B。“was / were+不定式完成式”的意思是本想做某事（但实际上未做成）。
56. She __________ fifty or so when I first met her at the conference.
A. must be B. had been C. could be D. must have been
【解析】答案选D。must have done表示对过去情况的推测，其意为“一定……”。
57. It is not __________ much the language as the background that makes the book difficult to understand.
A. that B. as C. so D. very
【解析】答案选C。not so much ...as为惯用表达，其意为“与其说……不如说……”。
58.The committee has anticipated the problems that __________ in the road construction project.
A. arise B. will arise C. arose D. have arisen
【解析】答案选B。has anticipated 意为“预计到了”。will表将来，符合句意。(from www.yywords.com)
59. The student said there were a few points in the essay he __________ impossible to comprehend.
A. had found B. finds C. has found D. would find
答案选A。因主句为过去式，从句表示过去的过去，故用过去完成时。
60.He would have finished his college education, but he __________to quit and find a job to support his family.
A. had had B. has C. had D. would have
【解析】答案选C。have to的过去式为had to。
61.The research requires more money than __________.
A. have been put in B. has been put in C. being put in D. to be
【解析】答案选B。than后面是省略了it，还原应该是..than it has been put in。
62. Overpopulation poses a terrible threat to the human race. Yet it is probably __________a threat to the human race than environmental destruction.
A. no more B. not more C. even more D. much more
【解析】答案选B。not more ...than…的意思为“与其说是……，不如说是……”，句意为“与其说是威胁了人类发展，还不如说是威胁了环境”。(from www.yywords.com)
63.It is not uncommon for there __________problems of communication between the old and the young.
A. being B. would be C. be D. to be
【解析】答案选D。介词后介词there be结构时，其中的be通常要用being，但有个例外，就是介词for后接there be结构时，其中的be通常要用to be。比较：They planned on there being another meeting. 他们打算再开一次会议。They planned for there to be another meeting. 他们打算再开一次会议。
64.__________at in his way, the situation does not seem so desperate.
A. Looking B. looked C. Being looked D. to look
【解析】答案选B。由于句中主语the situation与look at为被动关系，故用过去分词。
65.It is absolutely essential that William __________his study in spite of some learning difficulties.
A. will continue B. continued C. continue D. continues
【解析】答案选C。It is essential that+虚拟语气(should+动词原形)，should可省略。
66.The painting he bought at the street market the other day was a __________forgery.
A. man-made B. natural C. crude D. real
【解析】答案选C。crude的本意是：天然物质，处于未加工状态的物质，尤指原油。可引申指“粗糙的、未加修饰的”，crude forgery指拙劣的赝品。(from www.yywords.com)
67.She’s always been kind to me
71.This sort of rude behavior in public hardly __________a person in your position.
A. becomes B. fits C. supports D. improves
答案选A
【解析】答案选A。become在此表示“与..相称，适宜，适于”。That dress becomes you. 那件衣服很合你身。It does not become you to use insulting words like that! 你用那样恶语伤人太不合适了!(from www.yywords.com)
72.I must leave now. __________,if you want that book I’ll bring it next time.
A. Accidentally B. Incidentally C. Eventually D. Naturally
【解析】答案选B。incidentally意为“顺便说一句”，用于口语中另换话题；accidentally意为“意想不到地”。
73.After a long delay, she __________replying to my e-mail.
A. got away with B. got back at C. got back D. got round to
【解析】答案选D。比较：get away with 逃避责罚；get back at sb 报复；get back:（一度失去后）恢复力量，东山再起；get round to doing sth （较重要之事处理完毕后）处理某事。
74.Personal computers are no longer something beyond the ordinary people; they are __________ available these days.
A. promptly B. instantly C. readily D. quickly
【解析】答案选C。比较：promptly意为“敏捷地，迅速地，立即地”；instantly意为“立即，马上”；readily“无困难地，容易地”。
75.In my first year at the university I learnt the __________of journalism.
A. basics B. basic C. elementary D. elements
【解析】答案选D。根据句意，应选名词，而四个选项中只有A、D选项为名词。Basics意为“基本，要素”；elements意为“原理, 基础”。
76.According to the new tax law, any money earned over that level is taxed at the __________of 59 percent.
A. ratio B. percentage C. proportion D. rate
【解析】答案选D。ratio为数学术语，通常以具体数据体现两个关系平行的事物的数量之比，所涉及的两个比较项必须同时出现；rate指动态的率、比率、速率等；percentage指部分在整体中所占的准确的百分率、百分比；proportion指两个关系平行的事物在大小、数量、程度等方面的比例、比率、比重等，突出孰大孰小，也可指部分在整体中所占的比例，还常表示整体中各部分之间协调或和谐的关系，指匀称，平衡。
77.Thousands of __________at the stadium came to their feet to pay tribute to an outstanding performance.
A. audience B. participants C. spectators D. observers
【解析】答案选C。spectator意为“观众”，符合句意。
78.We stood still, gazing out over the limitless __________of the dessert.
A. space B. expanse C. stretch D. land
【解析】答案选B。expanse用作名词意为“辽阔，广袤”。又如：A vast expanse of rice fields was laid out before us. 大片稻田展现在我们面前。
79.Doctors often __________uneasiness in the people they deal with.
A. smell B. hear C. sense D. touch
【解析】答案选C。sense表示“感知，了解”。
80.Mary sat at the table, looked at the plate and __________her lips.
A. smacked B. opened C. parted D. separated
【解析】答案选A。smack one's lips意为“(馋得)舐嘴唇”，即汉语中说的“垂涎三尺”。