Earth is believed ______ by an object the size of Mars at some point in the dist
题型:不详难度:来源:
Earth is believed ______ by an object the size of Mars at some point in the distant past before itssurface cooled.A.to be hit | B.to have hit | C.to have been hit | D.to hit |
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答案
C |
解析
试题分析:句意:人们相信,地球在其表面冷却之前被类似火星大小的物体撞击过。分析语境可知主语Earth和hit之间为动宾关系,所以用被动语态。“被撞击”be hit这个动作发生在“冷却”cool这个动作之前,故用完成时态。故选C。 |
举一反三
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