These achievements_______ without the contribution of Qian Xuesen, a key leader of the New China's nuclear, missile and so on．
| A．would have been unthinkable | B．would not be unthinkable |
| C．would be unthinkable | D．would not have been unthinkable |
相关试题
That little boy has some trouble _______ in public.
| A．to speak | B．speak | C．speaks | D．speaking |
Yesterday she sold her car，______________ she bought a month ago.
| A．whom | B．which | C．that | D．where |
The whole family _______ to Shanghai for holiday next week.
| A．is going | B．are going | C．goes | D．have gone |
Mother told me ________a noise in the hall.
| A．don’t make | B．make not to | C．not to make | D．to make not |
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