把下列句子改为被动语态或主动语态
【小题1】He has given the child some interesting books.
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【小题2】He has repaired the machine for two hours.
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【小题3】She has already returned this book to the library.
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【小题4】I have made him work hard.
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【小题5】We have planted many trees on the hill in the last five years.
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【小题6】The table has been painted green by his father.
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【小题7】The teacher has been asked to explain the sentence twice by some students.
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【小题8】This matter has been talked about recently.
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