Earth is believed ____ by an object the
题型:选择题
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
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