问题描述：
将这些句子改为被动形式.
1.Today,people make sky lanterns at festvals and other celebrations.
2.My grandma puts paper cutting on windows during the Spring Festival every year.
3.Every morning Mr.Green polishes his shoes.
4.Mary invited some of her classmates to her birthday party yesterday.
1.Today,people make sky lanterns at festvals and other celebrations.
2.My grandma puts paper cutting on windows during the Spring Festival every year.
3.Every morning Mr.Green polishes his shoes.
4.Mary invited some of her classmates to her birthday party yesterday.
问题解答：
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