Question

Earth is believed ______ by an object the size of Mars at some point in the distant past before its

surface cooled.

A. to be hit B. to have hit

C. to have been hit D. to hit

 

Answer 1

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。

考点：考查时态和语态。