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  3. Canadian scientists have calculated that one human being should be struck every nine years by a meteorite, while each year sixte

Canadian scientists have calculated that one human being should be struck every nine years by a meteorite, while each year sixte

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问题 Canadian scientists have calculated that one human being should be struck every nine years by a meteorite, while each year sixteen buildings can be expected to sustain damage from such objects.
选项 A、one human being should be struck every nine years by a meteorite
B、a human being should be struck by a meteorite once in every nine years
C、a meteorite will strike one human being once in every nine years
D、every nine years a human being will be struck by a meteorite
E、every nine years a human being should be struck by a meteorite
答案D
解析 首先，A、B、E中的should的使用不对，should作情态动词，含有“应该”之意，在本句中，该语气是不合逻辑的，而应当用will表示“将会”。C、D之间几乎是一致的，只不过时间状语一个在前，一个在后，从语意看无太大差异。但根据while的前后对比关系及前后尽可能形式一致原则，选D而去C，因为未划线的while从句中时间状语each year在句首。
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