将下列各句由主动语态变为被动语态
问题描述：
将下列各句由主动语态变为被动语态
1.we must keep our hands clean.
2.they will donate money to help the poor family.
3.i must take good care of my sister at home today.
4.people don't produce oil in america.
5.her bofriend gave her some flowers on her birthday.
6.did mr black take you here?
答
Our hands must be kept clean.Money will be donated to help the poor family.My sister must be taken good care of at home by me today.Oil isn't produced in America.She was given some flowers on her birt...