51. If you have been generous to a person for a period of time, it is most likely that the person will take advantage of your generosity and trade on your “weakness” become appreciative of your kindness.

A. but not B.let alone C. rather than D. instead of

52. A poet must not write for the ages past, but for in which he lives and those which are to follow.

A. one B. those C. the one D. that

53. There is a delicate balance of nature many square miles of ocean and vegetation and clean air are needed to maintain only a relatively few human beings.

A. where B. in which C. when D. how

54. There are cases new factories are being put up and beautiful old trees are going to be cut down for a new factory.

A. which B. where C. that D. when

55. Somebody in the next room must be ill, a doctor has just come out.

A. because B. for C. in that D. as

56. To understand the situation completely requires more thought than thus far.

A.has given B. was given C.being given D. has been given

57. Of great significance the nation-wide movement is the Kampuchean people in their heroic struggle against the aggression of the Vietnamese.

A. to support B. for supporting

C. supporting D. of supporting

58. Many farmers came to the city, jobs and for all the other legendary opportunities of life in the city.

A. looking for B. to look for

C. having looked for D. looked for

59. It is requested that an applicant whose undergraduate work is done at another institution two copies of undergraduate transcripts and degrees directly to the dean of the graduate school.

A. must send B. send C. are to send D. need send

60. You her in her office last Friday; she’s been out of town for two weeks.

A. needn’t have seen B. might have seen

C. must have seen D. can’t have seen

51. Crather than 表示对比，在意思上前后形成对照：take advantage of your generosity…rather than become appreciative of your kindness意为“利用你的慷慨，而不是理解你的好意”。另外，rather than在结构上起并列作用，使take advantage与become appreciative平行。

52. Cthe one替代the age，还原为：…but must write for the age in which he lives and the ages which are to follow。

53. Bin which在定语从句中做状语，相当于in the balance of nature (many square miles of…)。

54. Cthat引导case的同位语从句，其他连接词都不合适。

55. Bfor连接一个原因分句，对前面的推测做原因上的解释。请考生记住：无论从逻辑推理还是从语法规则上看，只要前面是表示推测的句子，后面大都用for连接后一句，而不用其他连词。

56. D时间状语thus far“到目前为止”，与现在完成时连用，据此排除B、C。比较从句完整的结构应该是…than the thought which has been given thus far，可以把than 看做关系代词在从句中做主语，也可以把主语看做是省略了。

57. A题句由于主语较长，采用了倒装结构，可还原为：the nation-wide movement to support the Kampuchean people in their heroic struggle against the aggression of the Vietnamese is of great significance。movement要求不定式做定语，其他选项均不符合语法规则。

58. Alooking for…分词短语做came的伴随状语，如果选to look for做目的状语的话，不该有逗号。

59. B动词request要求其主语从句、宾语从句或同位语从句中谓语动词用(should+)原形表示虚拟。该句中that引导的是主语从句。

60. Dcan have done 表示对已发生的情况作否定推测“一定不是/没……”，根据句意只能选D。