- Excuse me, may I keep the book a littl
问题:
- 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
- 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