（2015•云南）— May I watch TV now, mum?— No, you . You must clean your room first.

题型：单选题题类：真题难易度：普通

— May I watch TV now, mum?— No, you . You must clean your room first.

A、may not B、needn't C、can't D、mustn't

举一反三

—You________go to a doctor. I'll take you to hospital.

—I think a bridge _________ over the river.

{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#}these letters?

— No, you ______________. You may go home, but you ______________ go to the net bar (网吧).

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