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: