I forgot to return the book to you yesterday. So I （）today.

I forgot to return the book to you yesterday. So I （）today.

A.might do it

B.must do it

C.had to do it

D.must have to do it

正确答案：B

★《布宫号》提醒您：民俗信仰仅供参考，请勿过度迷信！