—Can I walk across the road now, mum? —No, you_______. You have to wait until the light turns green.

题型：单选题题类：常考题难易度：普通

—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

举一反三

—Mr. Brown_____,but I'm not sure。

—No, you _______. It's 10 o'clock. You _______ go to bed.

—It_____ be him. I saw him in the classroom just now.

—Honey, you ________. Let's go out have something different.

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