——A——— no electronic computers,there would have been no artificial satellites or rockets.
A.Had there been B.If there were
C.should there be D.If there might be
请问为什么会是A,而不是其他的了,又是怎么看句子结构,求详解.
人气：337 ℃ 时间：2020-06-09 14:58:43
解答
A Had there been这是一个倒装的虚拟语气句子(Had there been) no electronic computers,there would have been no artificial satellites or rockets.要不是电子计算机（的出现）,就不会有人造卫星或火箭....
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