连词成句。
1. how, to, we, learn, a, ball, throw (.)
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2. can't, eat, we, class, in (.)
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3. that, is, his, chin, cut, a, on, bad, very (.)
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4. is, favorite, my, spring, season (.)
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5. kites, of, idea, helped, people, the, to, planes, make (.)
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