Question

【题目】— Can I walk across the road now, mum?
— No, you ________. You have to wait until the light turns green.
A.couldn't
B.shouldn't
C.mustn't
D.needn't

Answer 1

【答案】C
【解析】句意：——妈妈，我现在可以过马路吗？——不，你一定不要，你不得不等到绿灯亮。couldn't“不能”；shouldn't“不应该”；mustn't表示禁止，意为“一定不要”；needn't“不必”。所以选C。