问题描述：
英语 句子改为被动语态
1.Some people destroy the environment.
2.He doesn's water the flowers every day.
3.Does a large population cause many problems?
4.They clean their dormitory every day.
句子改为被动语态
1.Some people destroy the environment.
2.He doesn's water the flowers every day.
3.Does a large population cause many problems?
4.They clean their dormitory every day.
句子改为被动语态
问题解答：
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