These achievements_______ without the contribution of Qian Xuesen, a key leader
题型：不详难度：来源：
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 |
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答案
| A |
解析
| （本题考查虚拟语气。题干句子中“without the contribution of Qian Xuesen”表示与过去事实相反的虚拟语气，谓语动词要用“would（not）}lave done"’。） |
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