——This is film I’ve told you about. Isn’t it wonderful one?——Yes, it’s great.
—I’m busy with my schoolwork these days.—That’s great! You won’t get good grades ______ you work hard.
—Whose pencil box is this?—It _____ be Tom’s. It has his name on it.
—______ do you surf the Internet?—About twice a week.
— Do you often play ______ tennis after school?—No, I don’t like sports. I often play______ guitar.
— I didn’ t expect to see you studying at the library so early in the morning.— , huh?