题目

题型：不详难度：来源：

________you were coming，I would have stayed at home.

A．If I know

B．Should I know

C．Had I known

D．If I should have known

答案

C

解析

试题分析：句意：我要是知道你要来，我就呆在家里了。根据I would have stayed at home.可知是和过去相反的虚拟语气，从句用过去完成时，这里可以省略if，将had提前，所以选C。