下面的短文有l5处空白，请根据短文内容为每处空白确定l个选项。
Exercise
Whether or not exercise adds 51 the length of life, it is common experience that a certain52 of regular exercise improves the health and contributes to a feeling of well-being.
Furthermore, exercise 53 involves play and recreation, and relieves nervous tension and mentalfatigue, is not only pleasant but beneficial.
How much and what kind of exercise one should 54 merit careful consideration. Thegrowing child and the normal young man and young woman thrill to the exhilaration of strenuoussports. They fatigue to the 55 of exhaustion but recover promptly with a period of rest. Butnot so with 56 of middle age and beyond. For them moderation is 57 vital importance.
Just how much exercise a person of a given age can safely take is a question 58 to answer.
Individual variability is 59 great to permit of generalization. A game of tennis may beperfectly safe for one person of forty but folly for another. The safe limit for exercise 60 on thecondition of the heart, the condition of the muscles, the type of exercise, and the regularity with whichit is taken. Two general suggestions, however, will 61 as sound advice for anyone. The first isthat the condition of the heart and general health should be 62 periodically by careful, thoroughphysical examinations. The 63 is that exercise should be kept below the point of physical
exhaustion.
What type of exercise one should 64 depends upon one's physical condition. Youngpeople can safely enjoy vigorous competitive sports, but most older persons do better to limitthemselves to less strenuous activities. Walking, swimming, skating are among the sports that onecan enjoy and safely participate 65 throughout life. Regularity is important if one is to get themost enjoyment and benefit out of exercise.
51.A. for
B. to
C. at
D. of
52.A. heaviness
B. highness
C. amount
D. number
53.A. which
B. where
C. when
D. why
54.A. carry
B. make
C. bring
D. take
55.A. point
B. place
C. left
D. reverse
56.A. these
B. this
C. those
D. that
57.A. against
B. below
C. on
D. of
58.A. easy
B. hard
C. impossible
D. unnecessary
59.A. very
B. too
C. constantly
D. considerably
60.A. depends
B. bases
C. acts
D. carries
61.A. refer
B. regard
C. serve
D. treat
62.A. delayed
B. defended
C. designed
D. determined
63.A. other
B. another
C. one
D. same
64.A. endure
B. choose
C. rebuild
D. produce
65.A. with
B. from
C. in
D. on
第6部分：完形填空
51.B。此题考查的是介词搭配。题干：无论锻炼是否能延长生命，一定量的规律运动对身体健康会有所裨益。在四个选项中，add只可以与to搭配，意为“增加”，正符合上下文的
意思，故选B。
52.C。此题考查的是词汇。在四个选项中，A和B显然不符合逻辑，可供考虑的只有C和D。需要考虑的是exercise这个词。如果作为“体育锻炼”讲，它就是不可数名词。只有作为“一项运动”讲时它才是可数名词。根据上下文意思，exercise也不是用来强调体育项目的(没有用复数)，而amount正好与不可数名词连用，number则须与可数名词连用，故应选C。
53.A。此题考查的是定语从句引导词。从语法上分析，主句主语exercise的谓语应该是is not only pleasant but beneficial，中间显然应该是一个定语从句。此定语从句所缺少的是主语，故应选A。(定语从句的相关知识具体见本系列丛书的《每天1小时4周攻克职称英语周计划卫生类》中有关定语从句的章节。)
54.D。此题考查的是词汇。从语法上分析，“one should+动词”应该是前面那个主语的定语从句，只是定语从句的宾语which/that被省略了，而四个选项中，只有take可与exercise搭配，故应选D。
55.A。此题考查的是词汇。回答这一道题，首先要知道point这个词。它既可表达时间(“时刻”)或空间(“地点”)，也可表达“程度”的意思。to the point of正是“达到……的地步/程度”的意思，符合上下文要求。
56.c。此题考查的是代词。本空格后面的0f middle age and beyond提示了本空格要填的词应该是指“人”的词，而且不止一个人。从上下文看，these显然不合适，因为上文并没有特指哪些人，故只有C合适。
57.D。本题考查的是介词。本句中is后面应该是表语部分，四个选项中只有of合适。of
importance=important，of vital importance=very important。故选择D。
58.B。本题考查的是词汇。从语法上分析，这个空必须填上一个形容词做question的定语，从上下文分析，只能是hard合适，因为这里的hard=difficult。
59.B。本题考查的是词汇。前句已经说道，“不同年龄的人从事多少运动是一个难以回答的问题”，显然本句就应是“个人的差异太大，无法一概而论”，因此选择too是最恰当的。我们都知道，too…to…的结构具有否定的意义，too great to permit ofgeneralization正是这个意思。故选B。
60.A。本题考查词汇。虽然四个选项都可以与on搭配，但act on是“按照……行动”的意思，carry on是“进行”的意思，不符合上下文要求，只有depend on(“取决于……”)
和base on(“根据……”)可以考虑，但base是及物动词，应该是“base sth.on…”，故
只能选择A。
61.C。本题考查的是词汇。虽然四个选项都可以与as连用，但用法和意义各有不同。refer
to sb./sth.as：把……说成……;regard sb./sth.as：把……当成……;treat sb./sth.as把……当成……;均不符合上下文的要求，只有serve as(“充当……，作为……”)才在语法上和意义上恰当。
62.D。本题考查的是词汇。前面A、B和C三个选项的词义分别为“推迟”“保护”和“设计”，与上下文意义风马牛不相及，只有D项“测定，确定”才是恰当选项。
63.A。本题考查的是词汇。前面说到有两个一般性的建议，并且已提到“第一个”，那么“另
一个”只能考虑A和B两个选项了。二者都有“另一个”的意思，只是用法不同，another
不用冠词，而the other则需要定冠词the，故选A。
64.B。本题考查的是词汇。四个选项中，A、C、D三个选项的意思与上下文相去甚远，只有B项合适。one should choose是前面主语的定语从句，在定语从句中省略了关系代词that/which。故选B。
65.C。本题考查的是介词。四个选项中，只有in可与participate连用，意为“参加”，in的宾语是引导定语从句的关系代词that。因此C为正确答案。
