- Excuse me, may I keep the book a little longer? - Sorry. You return it today. A. must B. mustn
- Excuse me, may I keep the book a little longer?
- Sorry. You ________ return it today.
A. must B. mustn't C. can D. can't
在线课程A
- Excuse me, may I keep the book a little longer?
- Sorry. You ________ return it today.
A. must B. mustn't C. can D. can't
在线课程A