Whom Do You Love?

This post is not about asking whom do you love,but about the difference of   WHO and WHOM. Aja, aja English!! 

Take the test :

I've no idea _______ was standing by the doorway  when the postman came.

	a)	who
	b)	whom

With _______ will she be going to the party?

	a)	who
	b)	whom

_______ has left the gate open again?

	a)	who
	b)	whom