按要求完成下列各题。
1. mother/ is/ a/ my/ doctor (.) (连词成句)
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2. the/ girl/ a/ is/ nurse (?)(连词成句)
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3. This is a policeman. (变一般疑问句)
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4. The teacher is in the school (对划线部分提问)
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5. That is a doctor. (变否定句)
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