Directions: For each blank in the following passage there are four words or phrases marked A,B,C and D. Fill in each blank with a word or phrase that best fits the context.

Being alone in outer space can be   36 . That is one reason why astronauts on solo(单独的) space flights were given plenty of work to keep them   37 . They were also in constant communication with people on the earth.   38 , 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  39 space flights in the future. Will there be special problems of adjustment under such conditions?

Scientists have studied the reactions of men to one another during long submarine voyages. They have also found that the longer the voyage lasts, the more serious the problem of  40 is. When men are  41 together for a long period, they begin to feel   42  . 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 become very   43  .

Apparently, although no one wants to be  44 all the time, everyone needs some degree of privacy. When people are enclosed together, they are in what is called stress situation. That means that they are under an unusual amount of  45 or stress.

People who are well-adjusted are able to   46 stress situations better than others. That is one reason why so much care is taken in   47 our astronauts. These men undergo a long period of testing and training. One of the things tested is their behavior under stress, and thus they can do better than ordinary people.

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 communication 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 become 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. common        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. becoming         B. choosing          C. ordering        D. promoting

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 communication 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 become 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. common              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. becoming             B. choosing             C. ordering              D. promoting

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  45  . They were also constant communication with people on the earth.  46 , 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  47  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 48  is. When men are  49  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 become very  50 .

Apparently, although no one wants to be  51  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  52  or stress.

People who are well-adjusted are able to  53  stress situations better than others. That is one reason why so much care is taken in  54  our astronauts. These men undergo a long period of testing and training. One of the things tested is their behavior under stress.

45. A. tired     B. asleep C. conscious   D. busy

46. A. So far  B. After all     C. However    D. Therefore

47. A. long     B. fast     C. dangerous   D. direct

48. A. fuel      B. entertainment     C. adjustment  D. health

49. A. shut up B. held up      C. brought up D. picked up

50. A. pleasing       B. annoying    C. common     D. valuable

51. A. noisy    B. alone  C. personal     D. sociable

52. A. emphasis     B. conflict      C. power D. pressure

53. A. handle  B. create  C. affect  D. investigate

54. A. becoming    B. choosing    C. ordering     D. promoting