A. turn down B. turn up C. turn on D. turn to

　　( )38. If you for your favorite TV programs, you will feel sleepy.

　　A. stay up B. set up C. stay at D. pick up

　　( )39. —May I come in? I’m sorry I’m late.

　　—Come in, please. But could you tell me ?

　　A. how do you come to school B. what were you doing then

　　C. who you talked with D. why you are late

　　( )40. —Excuse me. Is the library open all day?

　　— . Only from 9 a.m to 4 p.m.

　　A. Yes, of course B. That’s right C. Sorry, I’m afraid not D. Sorry, I’m not sure