句型转换。
1. He thinks he can play the erhu. (改为否定句)
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2. She often wears pants and a sweater in fall. (对画线部分提问)
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3. I go to Shanghai. (改为将来时的句子)
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4. Are mitts and mittens the same? (作答)
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5. I would like some Chinese food. (对画线部分提问)
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