– There’s somebody at the door. Who ____ it be? Is it the postman?-- No. It ______ be him. It’s just seven o’clock. It’s too early.
—Who is that young man ____? —He’s Jack, my brother.
—You’re thirsty(口渴). ____ have a glass of milk? —Good idea.
—Is Mr. Brown a good teacher? —Yes. He is kind ____ us. We love him.
—Is this a photo ____ your family? —Yes, it is.
—What does your father do?—____