Question

____ 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
求解析

Answer 1

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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