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
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That truck nearly hit me; I _______.
#86748
A
might be killed
B
may been killed
C
may be killed
D
might have been killed
—Are you content with her lecture? —Nowhere near that. It ____.
#89196
A
may have been good
B
couldn’t have been worse
C
can’t be better
D
must be better
The space suits can be adjusted so that the team can reproduce different levels of gravity as if they________in space.
#86407
A
are
B
has been
C
were
D
had been
—I failed again. I wish I ____ harder.---But you ____.
#86370
A
had worked; hadn’t
B
worked; don’t
C
worked; didn’t
D
had worked; didn’t