--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

--Must I renew the book now?

--No, you ____. You ____ that before the deadline.

[　　]

A．mustn't; should to

B．needn't; should have done

C．may not; should do

D．can't; should have done