There __________ a teacher and seventy—two students in the classroom.
--Which T-shirt do you prefer? --The red one. It ____more comfortable.
—Lu does work hard. —Yeah. _____ of his time ______been spent on studies every day.
--You’ve given us a nice French dinner, Mrs. Smith. -- _______.
--- Mary knows so much about ______earth! ---Yes, although she is only ____eight- year-old girl.
--Could you please tell me ________? --Sure. Only ten minutes' walk. A. how soon he will be back B. how long have you been here C. how far it is from the park