连词成句，注意标点。
1. John, computer, use, can, a (.)
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2. have, What, you, do, lunch, for (?)
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3. What's, food, favourite, your (?)
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4. school, menu, Here, is, our (.)
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5. grapes, are, The, sour (.)
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6. would, What, like, you, for, dinner (?)
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