连词成句:
1. your, doing, what, father, is (?)
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2. they, doing, are, what (?)
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3. is, Peng, this, Zhang (.)
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4. is, in, writing, brother, an. the, my, e—mail, studying (.)
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5. grandma, reading, is, the, newspaper (.)
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6. Mike, doing, what, is (?)
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7. speaking, am, to, I, Chen Jie (?)
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