问题

You _______ cross the road when the traffic lights are red.
A:can
B:must
C:mustn’t
D:needn’t
B:must
C:mustn’t
D:needn’t
正确答案是:
同类题型
I find __________ very difficult to learn English well .
1. Learning_____ country’s language is a better way knowing _____culturebehind it.
The children ______ a P.E. class on the playground when it began to rain suddenly.
Betty’s brother isn’t old enough to look after ____.
These books______very interesting. Many children like reading them.