In contrast（成对比）,exactly correct measurement of time is very important in modem,industrialized societies.This is because industrialized societies require the helpful efforts of many pople in order to work.For a factory to work efficiently （well,quickly and without waste），for example,all of the workers must work at the same time.Therefore,they must know what time to start work in the morning and what time they may go home in the afternoon.Passengers must know the exact time that an airplane will arrive or depart.Students and teachers need to know when a class starts and ends.Stores must open on time in order to serve their customers.Complicated（复杂的）societies need clocks and calendars.Thus,we can see that if each person worked according to his or her own schedule, a complicated society could hardly work at all.

　　64．By sayingHumans are social animals,the author means .

　　A．they live all over the world

　　B．they are different from other animals

　　C．they live in one place, district or country, considered as a whole

　　D．they are divided into many groups

　　65．Time is not very important in nonindustrial societies. This is because people in those societies

　　A．dont have the word TIME in their languages

　　B．dont get used to using clocks and other timepieces

　　C．dont measure time in their daily-lives around an exact time schedule

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