问题

We _________wait until the traffic light turns green when we cross the road.
A:must
B:can
C:need
D:may;
B:can
C:need
D:may;
正确答案是:
同类题型
If Becky hadn’t missed the bus, she ______late for the lecture.[ ]
ungmember made several proposals, none of____ considered practical or acceptable
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the key to the car when my boss came towards me.Finally I could drive himhome as usual.