---Dad, must I practice the violin today...

---Dad, must I practice the violin today?

---No, you . You do it tomorrow.

A. mustn’t; may B. needn’t; must

C. needn’t can D. needn’t; mustn’t

C 【解析】试题分析：句意为：---爸爸，我今天必须练习钢琴吗？---不，不必。你可以明天练习。Must引起的一般疑问句，其否定回答通常用needn’t或don’t have to。mustn’t表示禁止，can表示可以、能够，may表示也许、可能。结合选项可知应选C。考点：考查情态动词的用法。

考点分析：

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