43

　　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

　　44

　　is．When men are

　　45

　　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

　　46

　　.

　　Apparently, although no one wants to be

　　47

　　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

　　48

　　or stress．

　　People who are well-adjusted are able to

　　49

　　stress situations better than others．That is one reason why so much care is taken in

　　50

　　our astronauts．These men undergo a long period of testing and training．One of the things tested is their behavior under stress．

　　41．A．tired

　　B．asleep

　　C．conscious

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