连词成句，注意所给的标点符号。
1.Think, I, pencil, it, his, is, (.)
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2.know, you, do, how, him, (?)
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3.boy, friend, the, your, is, (?)
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4.not, it, this, gold, ring, my, (.)
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5.in, the, that, your, and, lost, found, case, key, is, (?)
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