41 . Mr. Wilson said that he did not want to ______ any further responsibilities. 
  [A] take on  [B] get on   [C] put up  [D] look up 
答案：A词义辨析。take on 承担，开始雇用。据句意A项最适合。

42 . I would have told him the answer had it been possible, but I_____ so busy then. 
  [A] am  [B] were   [C] was  [D] would be 
答案：C 时态。前半部分是虚拟语气，而后面的but 引导的真实状语从句，而动作是发生在过去。所以用过去时。

43 . It is very important for the strong man to know that _______ strong he is, he cannot be the strongest. 
  [A] whatever  [B] whenever  [C] whichever  [D] however 
答案：D 连词。题干中后半部分开头是形容词strong ，所以用however 。

44 . The fact _______ he does so in so short period of time challenges explanation. 
  [A] why  [B] that  [C] what  [D] which 
答案：B 同位语从句。引导词常用B项that ，据句意B项最适合。

45. It's urgent that a meeting _______ before the final decision is made. 
  [A] will be arranged  [B] must be arranged   [C] be arranged  [D] would be arranged 
答案：C 虚拟语气。虚拟语气是一种动词形式，表示说话人的一种愿望，假设，怀疑，猜测等。That 后面的从句中的谓语动词用：should + 动词原形。

46. The United States is composed of fifty states, two of______ 
are separated from the others by land or water. 
  [A] them  [B] that  [C] which  [D] those 
答案：C 定语从句。非限定性定语从句，应该选C。

47 . The new English dictionary I bought yesterday ________ me almost twenty yuan. 
  [A] spent  [B] paid   [C] cost  [D] took 
答案：C 词义辨析。C项 cost 的主语是物，sth. cost sb. some money。题干中句子的主语是物所以选C。

48. In fact he had done_______ he could do to help the poor. 
  [A] what  [B] which   [C] as  [D] all which 
答案：A 宾语从句。what ，which 都可以引导宾语从句，但有区别，前者有双重作用，既做关联词又在句中做句子成份，所以应选A。

49. They discussed the problem three or four times, but could come to no_______. 
  [A] end  [B] conclusion  [C] result  [D] judgment 
答案：B 固定搭配。 come to conclusion 作出结论。

50. She is very careful. She______ very few mistakes in her work. 
  [ A] does  [ B] takes   [ C] makes  [ D] gets
 答案：C 固定搭配。Make mistake 犯错误。

51. When he was set free after twenty years in prison, he was amazed _______ the changed world he found. 
  [ A] at  [ B] of   [C] on  [D] to 
答案：A 介词。Be amazed at 对什么感到吃惊。

52 . I'd like to_______ a special table for the coming Valentine's Day. 
  [ A] preserve  [ B] deserve  [ C] conserve  [ D] reserve 
答案：D 词义辨析。Reserve 保留，预定，预约。

53. One of the benefits of the new model is that it is easier _____ than the old one.