Earth is believed to______by an object the size of Mars at some point in the dis

游客2024-01-18 70

问题 Earth is believed to______by an object the size of Mars at some point in the distant past before its surface cooled.

选项 A、be hit
B、have hit
C、have been hit
D、being hit

答案 C

解析这是一道语法题，考点是动词不定式完成时被动语态的用法。地球在那时已经被撞击了，因此用have been hit。

转载请注明原文地址:http://tihaiku.com/zcyy/3372006.html

相关试题推荐

随机试题

最新回复(0)

(Ididn’tmind)theircoming(late)tothelecture,butI(objected)theirmakin