连词成句。
1. a, train, an, faster, airplane, is, than (?)
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2. there, buses, many, how, are (?)
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3. they, to, eat, like, noodles, do (?)
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4. I, eat, may, in, a, restaurant (?)
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5. do, we, leave, when (?)
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6. from, city, our, far, Beijing, is (.)
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