问题

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

正确答案是：

同类题型

Do you want to eat here— No. Just fish and chips to ______, please.

Surely it doesn’t matter where the Student Union gets their money from; what ________ is what they do with it.

we got chicken– –No. we haven’t. Let’s go and buy some.

His actions _______ his thoughts.

The little chick _____ the earthworm, deciding whether to swallow it or let it go.[ ]