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题型：单选题题类：真题难易度：普通

As middle school students, we be afraid of difficulties if we want to make our dreams come true.

A、must B、shouldn't C、need

举一反三

We _________wait until the traffic light turns green when we cross the road.

——Must I do the rest of the work today?
——No. You _________ finish it tomorrow.

——______Bob be the manager of our company?
——He ______ be, but I'm not sure.

—Mum, ______ I visit the Science Museum tomorrow?

—I'm afraid you can't. It is closed on Monday.

Parents and schools make rules to help students. So students m{#blank#}1{#/blank#} follow the rules.

The book {#blank#}1{#/blank#} be returned before Saturday. (情态动词)

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