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题型：单选题题类：真题难易度：普通

—Who's singing in the garden?—It ________ be Tom. He always practices singing at this time.

A、can't B、need C、must D、mustn't

举一反三

— Will the new iphone cost a lot?
— I ________ think so. Apple's products are usually expensive.

We _______pay to get into the concert. It's free.

—Must I clean the room now?

—No, you . You can do it later.

You needn't finish the work today.

— Miss Wang, must I post the letter now?

— No, you ____. You can do it after school.

— Excuse me, could you help me check if _________ tomorrow?

— Ok. If you _____.

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