Question

【题目】I should not have laughed if I ______ you were serious.

A．thought B．would think

C．had thought D．have thought

Answer 1

【答案】C

【解析】考查虚拟语气。根据主句中should not have laughed可知，本句所讲与过去事实相反。If引导非真实条件句表示与过去事实相反时，从句结构为had done。故选C。句意：如果我当时想到你是认真的话，我就不会笑了。