He is cleaning the classroom(主动改被动）

The classroom is being cleaning by him.
Their homework have been finished by them.
His bike can be mended by me.
Ten books will be bought by her tomorrow.
They shouldn't be allowed to go out with their friends by us.
We are often made laugh by the old man.
Can this radio be mended by you?
P.S 楼上的应该用Bought不是Buyed!