要如何用 be supposed to .

要如何用 be supposed to .
要如何用 be supposed to .

要如何用 be supposed to .
We are supposed to go library.
You are supposed to feed the bird.
She is supposed to attend the class.
He is supposed to exercise.
I am supposed to do my project.
They are supposed to go to Mary's house.

是应该做的啊