按要求改写句子。
1. I have a dress. (改为复数句,数词为two)
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2. I am in the gym. (对画线部分提问)
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3. Our favourite colour is blue. (对画线部分提问)
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4. He likes bananas. (改为否定句)
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5. This is his book. (改为一般疑问句)
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