Earth is believed ______ by an object the size of Mars at some point in the distant past before its surface cooled．
#96481
A
to be hit
B
to have hit
C
to have been hit
D
to hit
推荐题目
A terrible flood hit Gongshang in Yunnan province, 200 persons.
#95820
A
killed
B
killing
C
to kill
D
kill
from the moon, our earth, with water seven percent of its surface, appears as a “blue ball”.
#94117
A
Seeing…covered
B
Seen…covered
C
Seeing…covering
D
Seen…covering
In order to know those who really need help as well as how to help them, ________ to help others.
#95245
A
going
B
to go
C
gone
D
go
The dog, _____, will be made a good watchdog.
#98867
A
to train properly
B
being trained properly
C
properly to train
D
trained properly