You ______ smoke. You are only 14 and it isn't allowed.

题型：单选题题类：常考题难易度：普通

2017届陕西西安市七十中九年级上期第三次月考英语试卷

A、mustn't B、don't have to C、needn't D、won't

举一反三

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

— ___________. He can do it in the afternoon.

—No, you _______.

—I'm not sure. He_____ drive his car.

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