1、Being alone in outer space can be frightening. That is one reason why astronauts on solo（单独的） space flight were given plenty of work to keep them  21   . They were also in 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 problems 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.

40、It is difficult to           the exact meaning of some words when you translate them into a foreign language.

A. show off          B. turn out                   C. bring out                 D. take to

39、We can see monuments here and there. Those who have made great          to human beings and society will never be forgotten.

      A. advance            B. progress                  C. contribution             D. achievement

38、Recently, there ________ a boom in population mobility, and according to the survey in 2000, 17 percent of the population _______ every year.

       A. is; moves          B. has been; moves             C. is; move                   D. has been; move

37、Anyone who has spent time with children          the difference in the way boys and girls           similar situations.

       A．aware of; respond to                           B．is aware of; respond to

       C．aware; responding                               D．is aware of; respond

36、If the safety protections against the accidents         , the miners         a chance to survive then.

       A．were taken; would have                        B．had been taken; didn’t have

       C．had been taken; would have had            D．were taken; would have

35、Whether age is happy or unpleasant depends less on money or on health than         on your ability to have fun.

       A. it is                   B. it was                      C. it depends                D. it does

34、Countless people in developing countries no longer suffer malnutrition. ________, poverty remains a problem worldwide.

       A. While                B. Nevertheless             C. Besides                    D. In addition

33、Come to me early tomorrow morning. If I _________, wake me up.

     A. sleep                B. will be sleeping        C. was still sleeping       D. am still sleeping