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
Frankly speaking, I'd rather you________anything about it for the time being.
#86409
A
have done
B
haven't done
C
don't do
D
didn't do
—Did you meet with the famous space hero , Yang Liwei ?—______ I had come here earlier !
#89510
A
If only
B
If not
C
But for
D
For fear
It is very kind of you to do the washing-up, but you it.
#88218
A
mustn’t have done
B
wouldn’t have done
C
mightn’t have done
D
didn’t have to do
I can’t believe that anyone else in the school can swim as fast as you, ________?
#87473
A
can I
B
can't they
C
can't you
D
can they