---I heard quite a few bikes were thrown away at Liaocheng University.--- _________________. They should be made use of.
—Is this girl your sister? —Yes, _____ is.
—Are those your parents? —______. They are Bob’s parents.
—Where ______ my books, Mom? —I don’t know.
Look! This is ____ eraser. And _____eraser is my sister’s.
—________do you spell clock? —C-L-O-C-K.