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  3. Does walking on the moon make life better for people on earth? (41) all the problems of our own world, why should we be spendi

Does walking on the moon make life better for people on earth? (41) all the problems of our own world, why should we be spendi

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问题     Does walking on the moon make life better for people on earth?  (41)  all the problems of our own world, why should we be spending huge sums on trips to outer space? Such questions as these are often asked, especially  (42)  those whose tax money is paying for space explorations. The answers to these questions are many and varied.
   Up to now, the practical benefits resulting  (43)  space research have included the development of new methods and skills, new processes, new services, new products, and even new companies created to make use of what  (44)  through space travel. Also among the benefits are better education (especially in scientific subjects),  (45)  management, higher quality of industrial products, and more rapid economic growth. People all over the world are now served by  (46)  weather predictions, better communication systems, and better understanding of the earth and its environment. Everyone will benefit  (47)  observations from space make it possible to measure the earth’s resources and  (48)  whether or not they are being used properly.  (49)  the space program will help our world deal with the problems of the environment. It has already brought a new appreciation of the complex system  (50)  man is only a part.
选项 A、to
B、for
C、by
D、from
答案C
解析 be asked by sb．是典型的被动语态表示法。译文：人们常常问这样的问题，尤其是那些为太空探险缴税的人。因此，C为正确答案。
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