These achievements_______ without the contribution of Qian Xuesen, a key leader of the New China's nuclear, missile and so on．
#89859
A
would have been unthinkable
B
would not be unthinkable
C
would be unthinkable
D
would not have been unthinkable
推荐题目
--- Ought we _____ clean the class room today?--- Yes, you _____.
#87764
A
to; ought to
B
/; ought
C
ought; ought
D
/; ought to
I have been looking for Michael for a whole day. Where ______ he have gone?
#88143
A
should
B
can
C
must
D
may
_____________half an hour earlier, you would have met the famous writer.
#87292
A
If you came
B
Would you come
C
Had you come
D
Should you have come