___________ the classroom, Lin Tao. ---OK, I will.
—_______ it, please! —R-U-L-E-R.
—Is that her book? —Yes, ______. It is nice.
—Is this your pencil? —No, ________. It’s his pencil.
—_______ is the ruler? Is it black? —Yes, it is.
—What’s that? —_____ is an eraser.