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  3. If it were only necessary to decide whether to teach elementary science to everyone on a mass basis or to find the gifted few an

If it were only necessary to decide whether to teach elementary science to everyone on a mass basis or to find the gifted few an

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问题     If it were only necessary to decide whether to teach elementary science to everyone on a mass basis or to find the gifted few and take them as far as they can go, our task would be fairly simple. The public school system, however, has no such 【B1】______, 【B2】______ the jobs must be carried 【B3】______ at the same time. Because we depend so 【B4】______ upon science and technology for our【B5】______, we must produce specialists in many fields.【B6】______we live in a 【B7】______ nation, whose citizens make the policies for the nation, large numbers of us must be educated to understand, to uphold, and 【B8】______ necessary, to judge the work of 【B9】______. The public school must educate both producers and【B10】______of scientific services.
    In education, there should be a good balance 【B11】______ the branches of【B12】______that contribute to effective thinking and【B13】______judgment. Such balance is defeated by【B14】______much emphasis on any one field. This【B15】______of balance involves not only the【B16】______of the natural sciences, the social sciences and the arts but also relative emphasis among the natural sciences themselves.
    【B17】______, we must have a balance between current and【B18】______knowledge. The attention of the public is continually drawn to new【B19】______in scientific fields and the discovery of new knowledge; these should not be allowed to turn our attention away from the sound, established materials that form the basis of【B20】______for beginners.
【B3】
选项 A、off
B、forward
C、away
D、on
答案D
解析 考查动词短语辨析。空格处所在句意为：…由于这种工作必须同时______。carry off意为“赢得，获得；成功地对付”；carry forward意为“发扬，结转，推进”；carry away意为“拿走，搬走；使激动，使着迷”；carry on意为“坚持下去，继续下去”，与原文中的“at the same time(同时)”构成呼应，表示工作必须同时进行，最符合题意。因此最佳选项为D．on。
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