Being alone in outer space can be frightening. That is one reason why astronauts on solo (单独的) space flights were given plenty of work to keep them 21 . They were also constant munication with people on the earth. 22 , being with people from whom you cannot get away might be even harder than being alone. This is what happens on long submarine (潜水艇) voyages. It will also happen on 23 space flights in the future. Will there be special problem of adjustment under such conditions?
Scientists have studied the reactions of men to one another during long submarine voyages. They have found that the longer the voyage lasts, the more serious the problem of 24 is. When men are 25 together for a long period, they begin to feel uneasy. Everyone has little habits of speaking and behaving that are ordinarily acceptable. In the limited space over a long period of time, however, these little habits may bee very 26 .
Apparently, although no one wants to be 27 all the time, everyone needs some degree of privacy. When people are enclosed together, they are in what is called a stress situation. That means that they are under an unusual amount of 28 or stress.
People who are well-adjusted are able to 29 stress situations better than others. That is one reason why so much care is taken in 30 our astronauts. These men undergo a long period of testing and training. One of the things tested is their behavior under stress.
21. A. tired B. asleep C. conscious D. busy
22. A. So far B. After all C. However D. Therefore
23. A. long B. fast C. dangerous D. direct
24. A. fuel B. entertainment C. adjustment D. health
25. A. shut up B. held up C. brought up D. picked up
26. A. pleasing B. annoying C. mon D. valuable
27. A. noisy B. alone C. personal D. sociable
28. A. emphasis B. conflict C. power D. pressure
29. A. handle B. create C. affect D. investigate
30. A. being B. choosing C. ordering D. promoting21--30 DCACA BBDAB
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(答案→)21--30 DCACA BBDAB
解析：
独自一人在太空中飞行让人感到孤独、压抑。科学家门研究发现，长时间乘坐潜水艇航行，需要对情绪作一些调整，否则就会处于一种长期的压抑状态中。在挑选飞行员时，要选那些心理素质好的，训练时特别注意他们处于压抑状态中的反应。
21．形容词词义辨析, 让独自进行太空飞行的宇航员有事情可做，使他们处于忙碌的状态（不至于感到孤独）。
22．连接性副词词语辨析, 根据上下文的逻辑关系，此处表转折关系，故选C项。so far迄今为止，表时间；therefore 表因果关系；after all 用来提醒对方注意。
23．形容词词义辨析,上文“This is what happened on long…”已暗示，故选A项。
24．名词词义辨析 短文第一段最后一句中“special problems of adjustment…”已暗示，因此填adjustment。
25．动词短语词义辨析 shut up关闭，封闭。当人们被封闭的时候，就会开始感到不安。hold up劫持；bring up 抚养；pick up 让某人搭车。
26．形容词词义辨析 根据句意：“在有限的空间中呆很长时间，既不说话，也不挪动会使人变得厌烦。”A, C, D三项均不合乎题意。
27．形容词词义辨析 前后句为转折关系，只有B项与后半句中privacy的意义相近。
28．名词词义辨析 由空格后的or可推断，所填之词应与stress意义相近，只有D项符合。
29．动词词义辨析 根据句意，空格内应填一个表“应对，处理”的词，只有A项符合。create创造，带来；affect影响；investigate调查。
30．动词词义辨析 根据上文，心理素质好的人比别人更能很好地应对压抑（stress situations）。在挑选飞行员的时候要特别注意这一点。bee成为；order预订；promote促进，促使。