——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
某班抽取6名同学参加体能测试,成绩如下:80,90,75,75,80,80.下列表述错误的是( )
经济特区是对外开放的窗口.在第一批经济特区设立后,1988年,我国又增设的经济特区是( )