题目内容
将下列句子改为主动句（括号内有词的，用其做主语）Keys are used by people for locking doors.
答案：.
解析：
解析：
| People use keys for locking
doors
|
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题目内容
将下列句子改为主动句（括号内有词的，用其做主语）Keys are used by people for locking doors.
| People use keys for locking
doors
|