问题
选择题
----I thought you wouldn’t mind.
----Well, as a matter of fact I don’t, but you _____ me first.
A．should ask
B．should have asked
C．must ask
D．must have asked
答案
答案：B
should 后接动词完成式表示“本来应该做某事，结果未做”，此处含有责备之意。
