____ your letter,I would have started two days ago.A If I received B Shoud I receive

题目

____ your letter,I would have started two days ago.A If I received B Shoud I receive
C If I could have received
D Had I received
本题答案是D

答案

答案：选D.
解析：这道题考察虚拟语气以及倒装结构的用法.
本句是对过去事情的虚拟,条件从句使用had+过去分词的结构,主句使用should(would,could,might)+have+过去分词的结构.
ABC三个选项结构都是错误的,D选项结构正确,且是采取倒装结构.
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