Earth is believed ______ by an object th
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