Earth is believed ______ by an object the size of Mars at some point in the dist
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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 |
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答案
C |
解析
考查非谓语动词。根据句意可知事情已经发生,故用不定式的完成式,earth与hit为被动关系,故用被动,选C。 |
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