句型转换。
(1)I can play the piano.(对话线部分提问)
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(2)She wants to join the English club.(对话线部分提问)
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(3)My sister can sing and dance.(改为否定句)
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(4)He needs some help with his English.(改为否定句)
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(5)Can you play the trumpet well?(作否定回答)
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