问题 选择题

I should not have laughed if I _________ you were serious.

A.thought

B.would think

C.had thought

D.have thought

答案

C

题目分析:句意:如果我认为你是严肃的,我不会笑的。根据should not have laughed可知这是对过去事实的假设,因此if引导的条件状语从句用过去完成时。故选C。

考点:

材料题
单项选择题