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单项选择题

Earth is believed to () by an object the size of Mars at some point in the distant past before its surface cooled.

A. be hit
B. have hit
C. have been hit
D. being hit

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热门试题

单项选择题Caroline has never ever broken her promise, ______.

A. neither had I
B. never will I
C. not would I
D. nor have I

单项选择题In Australia the Asians have made their influence () in businesses, large and small.

A. feeling
B. feel
C. felt
D. to be felt