句子改成被动语态 people have used paper and printing for ages

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句子改成被动语态 people have used paper and printing for ages
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句子改成被动语态 people have used paper and printing for ages
句子改成被动语态 people have used paper and printing for ages

句子改成被动语态 people have used paper and printing for ages
Paper and printing have been used (by people )for ages

for ages,paper was used by people

paper and printing have been used for ages by people

paper and printing for ages are used by people