把下列句子中的间接引语改为直接引语。
1. The doctor asked him how he felt.
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2. He asked me whether I studied English or French.
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3. He asked me how long it would take to go there by plane.
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4. I asked her why she hadn't told me earlier.
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5. He asked me if she was coming.
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6. He asked me whether I had any difficulty.
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7. The doctor advised her not to eat too much fat.
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