题目内容

________ your letter, I would have started off two days ago.
A.If I receivedB.Should I receive
C.If I could have receivedD.Had I received
D

试题分析:考查虚拟语气,从后面的主句的时态可知if条件句要用和过去相反的虚拟语气,if的非真实条件句可以省略if,提前had,were,should,Had I received="if" I had received,选D
点评:考查虚拟语气的时候要注意和不同的时间相反的情况,主从句的时态是不一样的。要注意记忆。
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