This is ________ "s".
[ ]
I go to bed ________ about nine o'clock every day.
It's warm (暖和) here. Take ________ your hat, please.
It's seven. Let's ________ school.
Please give the note (纸条) ________ your teacher.
--- Are all the students ________?
--- Yes.
My ________ desks are in that room.
I think the hat is ________ the chair.
It's time ________ home.
It's ten o'clock. I must go ________.
A
B
C
D