—Do you have a ruler? —Yes, but a short _____. A. it B. ones C. one
— Is this __________classroom? — Yes, it’s________.
—________do you spell computer? —C-O-M-P-U-T-E-R.
—Are these buses? —________________.
— This is my ruler. _________ the blue pens? — They are Helen’s.
I am not tidy, ________my brother is.