问题
选择题
—Sorry, Mr. Wang. I didn’t finish the assignment yesterday.
Oh, you ________ have done it as yesterday was the deadline.
A．must
B．mustn’t
C．should
D．shouldn’t
答案
答案：C
考查情态动词用法must have done一定做了某事； Should have done本应该做某事实际上却未做。句意：你本应该昨天就完成的，因为昨天是最后期限。