You ________ wait for him. I'm not sure whether he'll come back or not today.

题型：单选题题类：模拟题难易度：普通

A、can't B、shouldn't C、mustn't D、needn't

举一反三

— Yes, I'm afraid we __________. That's the traffic rule.

—Don't be shy. Believe in yourself and everything will be OK.

—He love them, but I'm not sure.

—Yes, we _________ take it seriously.

—Sure, but you finish your homework first.

—No, it ______ be her. She is holding a meeting in the office now.

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