— Dad, must we wait for the green light?
问题:
— Dad, must we wait for the green light?
— Yes, I’m afraid we ________. That’s the traffic rule (规则).
A.can
B.may
C.need
D.have to
— Dad, must we wait for the green light?
— Yes, I’m afraid we ________. That’s the traffic rule (规则).
A.can
B.may
C.need
D.have to