问题描述：
主动语态与被动语态互换.1、Students should obey the rules of
主动语态与被动语态互换.
1、Students should obey the rules of the school.
2、We must take good care of our eyes.
3、Mary's room must be kept clean.
4、You can't see.the stars in the daytimes.
5、Must I do all the exercises?
主动语态与被动语态互换.
1、Students should obey the rules of the school.
2、We must take good care of our eyes.
3、Mary's room must be kept clean.
4、You can't see.the stars in the daytimes.
5、Must I do all the exercises?
问题解答：
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