— Have you seen ____ pencil? I left it here this morning.—Is it _____black one? I think I saw it somewhere.
34.Although he Was in poor health,Robert succeeded——other more famous engineers failed.
33. I've promised to keep it secret so I Can’t really tell you anything——what you know already.
32.1 want to buy that kind of cloth because I have been told the cloth———well.
31.A study shows that students living in non—smoking dorms are less likely to——the habit of smoking.
30.——is a good chance that he is willing to allow U8 to join in the ball game.