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】

試題分析：句意：人們相信，地球在其表面冷卻之前被類似火星大小的物體撞擊過(guò)。分析語(yǔ)境可知主

語(yǔ)Earth和hit之間為動(dòng)賓關(guān)系，所以用被動(dòng)語(yǔ)態(tài)�！氨蛔矒簟眀e hit這個(gè)動(dòng)作發(fā)生在“冷卻”cool這個(gè)動(dòng)作

之前，故用完成時(shí)態(tài)。故選C。

考點(diǎn)：考查時(shí)態(tài)和語(yǔ)態(tài)。