几道英语填空

几道英语填空
we hear the girl sing every morning(改为被动语态）
The girl ____ ____ ____ ____(by us)every moring
It's impossible for the boy to carry the heavy box.(改为同义句)
It's ____ ____ the boy can carry the heavy box
supproting charities is a good way to help people.(改为同义句)
____ is good ____ help people ____ ____charities.