---- we clean the blackboard at once ?----No, you . You clean it after class.A. Must; needn’t; may B. Must; mustn’t ; canC. Shall ; can’t must D. Need; mustn’t ; may A [解析]句意:--我们必须马上擦黑板吗?--不.你们题目和参考答案——青夏教育精英家教网—

题目内容

----______ we clean the blackboard at once ?

----No, you _____ . You_____ clean it after class.

A. Must; needn’t; may B. Must; mustn’t ; can

C. Shall ; can’t must D. Need; mustn’t ; may

A 【解析】句意：——我们必须马上擦黑板吗？——不，你们不必了。你们可以在课下擦它。must必须，表示要求；needn’t不必，表示要求；may可以，表示允许；mustn’t禁止；can能，表示能力。Shall应，表示建议；can’t不可能，表示有把握的推测。Need需要，表示必要性。由need引出的一般疑问句，肯定回答常用must或have to;否定答语常用needn't. 由m...

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How to Be a Great Friend
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Stand up for him.	1. If your friends are 4. ________ at, you can find a creative way to help them. 2. Show your courage and 5. ________ your friends.

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