48. _A_ a teacher in a university, it is necessary to have at least a master's degree.
A To become   B Become   C One become   D On becoming
master's degree 硕士学位； 当介词on后面加动词ing形式时表示时间概念“在…之后”。

49. The little man was _C_ more than one metre fifty tall.
A nearly   B quite   C hardly   D almost
hardly more than 不足，不到。

36. The little man was _B_ one metre fifty high.
A almost more than   B hardly more than   C nearly more than   D as much as

53. Medical care reform has become this country's most important public health _C_.
A question   B stuff   C matter   D issue
matter 事物，事情； question 有疑而问，并且有待回答的问题；
questions and answers Q & A 问与答； issue n. 问题（强调的是政治方面的问题）。
1999年前，台湾问题Taiwan issue；1999年后，台湾问题Taiwan question，态度转变。

60. If you don't like to swim, you _B_ stay at home.
A should as well   B may as well   C can as well   D would as well
may as well 还是，到不如。

70. They are teachers and don't realize _A_ to start and run a company.
A what it takes   B what takes it   C what they take   D what takes them
start and run a company 创立并经营一家公司。

23. A healthy life is frequently thought to be _D_ with the open countryside and homegrown food.
A tied   B bound   C involved   D associated
be involved with 牵涉，卷入； be associated with 与...相关，联系起来。
homegrown food 自家种的食品； wine 葡萄酒； house wine 自家的酒。

33. The traditional approach _A_ with complex problems is to break them down into smaller, more easily managed problems.
A to dealing   B in dealing   C dealing   D to deal
approach n. 方式，方法； approach to + 动名词。

43. It's already 5 o'clock now. Don't you think it's about time _C_?
A we are going home   B we go home   C we went home   D we can go home
it's about time后面加句子，要用一般过去时来体现虚拟语气。

44. Lightning is a _A_ of electrical current from a cloud to the ground or from one cloud to another. [Lightning n. 闪电]
A rush   B rainbow   C rack   D ribbon
rush n. 冲撞，冲击，撞击； rainbow n. 彩虹，幻想； rack n. 支架，挂架；
ribbon n. 缎带，丝带，绒带。

46. I've already told you that I'm going to buy it, _A_.
A however much it costs   B however does it costs much
C how much does it cost   D no matter how it costs
however在这里不表示转折，而是句子的引导词，这种情况下它相当于：no matter how。
意思是，我已经决定要买了，不管多少钱。

47. New York _A_ second in the production of apples, producing 850,000,000 pounds this year. [rank 排名，名列第几，强调名列前茅；Big Apple 纽约]
A ranked   B occupied   C arranged   D classified