The main problem of the round-the-clock working system lies in ________.

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• 1Why is the question of “how easily people can get used to working at night” not a mere academic question、

  A.Because few people like to reverse the cycle of sleep and wakefulness.

  B.Because sleep normally coincides with the hours of darkness.

  C.Because people are required to work at night in some fields of industry.

  D.Because shift work in industry requires people to change their sleeping habits.

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• 2From the passage it can be seen that employeeship helps one ________.

  A.to be more successful in his career

  B.to be more specialized in his field

  C.to solve technical problems

  D.to develop his professional skill

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• 3According to the writer, professional knowledge or skill is ________.

  A.less importance than awareness of being a good employee

  B.as important as the ability to deal with public relations

  C.more important than employer-employee relations

  D.more important as the ability to co-operate with others in the organization

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• 4The word “dubious” (L. 2, Par

  A.2) most probably means ________.A.valuable

  B.useful

  C.doubtful

  D.helpful

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• 5According to the passage, with the development of modern industry, ________.

  A.factory labourers will overtake intellectual employees in number

  B.there are as many middle-class employees as factory labourers

  C.employers have attached great importance to factory labourers

  D.the proportion of factory labourers in the total employee population has decreased

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• 6The best solution for implementing the 24-hour working system seems to be ________.

  A.to change shifts at longer intervals

  B.to have longer shifts

  C.to arrange for some people to work on night shifts only

  D.to create better living conditions for night workers

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• 7It is possible to find out if a person has adapted to the changes of routine by measuring his body temperature because ________.

  A.body temperature changes when the cycle of sleep and wakefulness alternates

  B.body temperature changes when he changes to night shift or back

  C.the temperature reverses when the routine is changed

  D.people have higher temperatures when they are working efficiently

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• 8Which of the following statements is NOT TRUE、

  A.Body temperature may serve as an indication of a worker’s performance.

  B.The selection of a number of permanent night shift workers has proved to be the best solution to problems of the round-the-clock working system.

  C.Taking body temperature at regular intervals can show how a person adapts to the changes of routine.

  D.Disturbed sleep occurs less frequently among those on permanent night or day shifts.

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• 9You should have put the milk in the ice box; I expect it ________ undrinkable by now.

  A.became

  B.had become

  C.has become

  D.becomes

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• 10Codes are a way of writing something in secret; ________, anyone who doesn’t know the code will not be able to read it.

  A.that is

  B.worse still

  C.in short

  D.on the other hand

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