—May I go out now, Dad? —No. You _____ l
题型:选择题
问题:
—May I go out now, Dad?
—No. You _____ let your mother know first.[ ]
A. can
B. may
C. need
D. must
—May I go out now, Dad?
—No. You _____ let your mother know first.[ ]
A. can
B. may
C. need
D. must