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题型：单选题题类：模拟题难易度：普通

You be hungry after the long walk. Help yourself to some cakes.

A、should B、 must C、need to D、ought to

举一反三

— Who's that man in our classroom? It ________ be Mr. Brown. He is much taller.
— You mean the man in white? He is an exchange student from England.

Sir, you ______use your mobile phone at the gas station. It's very dangerous.

— ________ I finish my homework now?

— No, you ________.

—Must I finish my homework this morning?

—No, you ___________. You can finish it this afternoon.

Your pet dog looks sick. You take it to the animal hospital at once.

It's time for lunch now. Kitty ___________ be having lunch with her friends in the school canteen.

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