—Can I walk across the road now, mum?—No, you _______

试题详情及答案解析

—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

答案：C

试题分析：句意：——妈妈，现在我能过马路了吗？——不，你不能。你必须等到交通灯变绿。mustn't表示“禁止、不允许”，所以选C。
考点: 考查情态动词的用法。