将下列句子转换成被动语态.1.The children will sing an English sang at the

将下列句子转换成被动语态.
1.The children will sing an English sang at the party tanight.
An English sang _____ _____ _____ _____ the children at the party tanight.
2.He made me do that for him.
I _____ _____ _____ _____ that for him.
3.We must water flowers every day .
The flowers _____ _____ _____ every day.
4.Did he dean the blackboard just now?
_____ the blackboard _____ by him just now?
5.Columlaus discovered the land df America.
The land of America _____ _____ _____ Columlaus.