题目内容
【题目】—Must we clean the room at once?
—No,you ________.You can do it after school.
A.mustn't B.needn't C.can't D. may not
【答案】B
【解析】
此处must是必须之意,对“Must we...?”句型的否定回答应为“No,you needn't.”或“No,you don't have to.” 故选B。
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