--Must I renew the book now?-No,you _____.You _________ that before

题目

--Must I renew the book now?-No,you _____.You _________ that before
2.--Must I renew the book now?
-No,you _____.You _________ that before the deadline.
A.mustn't; should do B.needn’t; should have done
C.may not; should do D.can't; should have done
想说答案是B的请绕行..

答案

因为这位同学借的书已经过期了 不能再更新延期
no,you can't 不能延期了
you should have done that before the deadline 你本应该在到期之前延期的.
should have done 表示应该做却以前没有做