—Mr Li, I am sorry I ______ my exercise-books at home.—That’s all right. Don’t forget to ______ them to school tomorrow.
Two and ________ is seven.
—______? — 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.