Lisa ,hurry up !The bus is coming . Oh ,no . We______cross the street until the traffic lights turn green .

题型：单选题题类：真题难易度：普通

Lisa ,hurry up !The bus is coming .
Oh ,no . We______cross the street until the traffic lights turn green .

A、mustn't B、needn't C、should

举一反三

— It's a place where bags be left for a short time, especially at a station.

— Sorry, I ______. I have to go to a meeting.

—I'm sorry, I won't.

—Sure. ________ you give it to my sister after you use it?

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