—Don't worry. We can ask Mr Wang for help now.—Mr Wang? He has left for Guangzhou, and he____a speech there in two days.
—______? — No, it’s on the sofa.
—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.