各位考生：
医学考博英语高频词汇与词组的词汇题练习就到这里告一段落。从今天开始，我们开始医学考博英语词汇的完形填空题的练习。华慧考博老师将每天为大家练习和讲解一个完形填空的练习，希望大家能够和老师一起每天都有一点进步。
今天是2019年10月25日，以后华慧考博将每天与大家一起做一道完形填空真题练习，现在开始做医学重点词汇真题练习的第二十一组练习！
医学考博英语重点词汇真题练习训练第二十一组：
真题部分：
Despite growing numbers of joggers, Canada Fitness Surveys across the country demonstrate that Canadians are less physically fit than their US or Swedish counterparts:  many people were  1  that they do not exercise often or vigorously enough for optimal benefits. Only about 25 percent of Canadian adults paddle at the recommended level that increases the heart beat to a target level  2  there for at least 15 minutes thrive weekly. Men are more likely to be either “sedentary” or “very active”, while women are more likely to be “moderately active”.
Common reasons for not exercising are no willpower, poor facilities, boredom, fatigue, no partner, sheer laziness or lack of time. Experts  3  that better use of available time is the answer, with incentives and rewards to help sustain the exercise habit until the benefits become so  4  that activity is automatically scheduled into daily routines.
A modest increase in daily activity  5  the sedentary could improve the overall health of our population more than increased activity in those already dedicated to exercise. Activity in older people helps them  6  agile, work and feel better. Many elderly people who remain active have a lower-heart rate than inactive youngsters. For example, one famous marathoner (Clarence Demar), even after age 60, was in better shape than  7 . Currently only 35 per cent of the over 65 take regular walks. Even a small gain in fitness among the elderly may permit them to replace a restricted lifestyle with  8  in which they can play golf, dance, cycle and    9 . The overall  10  is clear: physical activity benefits body and mind, and should be encouraged for all, especially those who are now the least active.
1. A. convinced       B. convince         C. convincing     D who convinced
2. A. to keep it        B. but keeps them    C. and keeps it   D. thus keeping them
3. A. assume          B. counter        C. suggest        D. expect
4. A. self-confident    B. self-existent    C. self-evident     D. self-sufficient
5. A. in              B. to             C. by            D. for
6. A. stay            B. grow          C. come        D. live
7. A. most of the people               B. young people
C. many younger people            D. many people
8. A. the enriched one                 B. other enriched one
C. an enriched one                 D. enriched one
9. A. watch TV       B. work         C. drive         D. garden
10. A. way            B. message       C. interest       D. conclusion
 
答案解析部分：（请先做题，再看参考答案）
1.A   be convinced that确信；承认。
2.C   此处要表达的意思是“将心搏提高到某一水平并保持至少15分钟”。由此可知这里的动词keep与increase并列，这里的代词代指的是单数名词the heart beat。
3.B   counter反驳。assume假定，设想。suggest建议，提议。expect期待，期望。根据上下文可知这里应当用counter。
4.C   self-evident明显的。self-confident自信的。self-existent独自存在的。self-sufficient自给自足的。根据上下文可以推断这里要表达“知道这些好处变得明显”的意思。
5.C   句中的the sedentary是a modest increase的发出者，因而要用介词by。
6.A   stay+形容词表示“保持某种状态”。stay agile保持灵敏。
7.C   这里要填的词应当与inactive youngsters相对应。
8.C 这里要填的词应当与前面的a restricted lifestyle表达相反的意义，只有C项符合。
9.D   这里要填的词应当与play golf、dance、cycle这三个表示运动的词并列，因而要选择garden。
10.B   由于出现在文章末尾，这里容易选成conclusion，但是通过对文章的理解可知这里并不是表示对前文的总结，而是点出“gain”的具体内容，由此可以排除conclusion。
 
学习自己的事情，希望大家在做真题练习的时候能够做到自觉自律。每天坚持先自己做题，然后再对照答案解析来分析自己的得失。这样可以让大家很快地发现自己之前记下的词汇哪些已经熟练掌握，哪里还没有掌握，哪里又还处于磨棱两之间。针对自己容易出错的题与看不懂的题，大家可以着重多看几遍，分析自己做错的原因，然后将之记在一个笔记本上，以便于整理做二次练习用。等到所有整理出来的错题大家都可以做对之后，说明大家对于之前所记词汇的掌握已经熟悉。祝大家都能够考博成功，明天见！更多考博词汇复习资料请关注华慧考博：gt;www.hhkaobo.com