34.The ground is rather wet, so it ____last night, ____it ?

　　 A.must have rained,　 didn't　　　　　 B.must rain, didn't

　　 C.must have rained, mustn't　　　　 D.must rain, mustn't

33.He was late.That is___he saved a boy who had fallen into a river.

　　 A. why　　　　 B.when　　　　 C.for that　　　 D.because

32.___troubles　 me is ____I don't　 know how to stop the boy from crying.

　　 A.What, that　　 B.That, what　　 C.That, that　　　 D.It, that

31.The murderer was brought in,with his hands______behind his back

　　 A.being tied　　 B.having tied　　　 C.tied　　 D.to be tied

30.You will be late_____you leave immediately.

　　 A.until　　　 B.if　　　　 C.or　　　　 D.unless

29.____is known to all, the moon travels round the earth once every month.

　　 A.It　　　　 B.As　　　　 C.That　　　 D.what

28.There are five pairs_____, but I'm at a loss which to buy.

　　 A.to be chosen　　 B.to choose　　　 C.to choose from　　　 D.for choosing

27.I wonder why Jenny_____us recently. We should have heard from her by now.

　　 A.hasn't　 written　　 B.doesn't　 write　　 C.won't　 write　 D.hadn't written

26.Excuse me for ringing you so late in the evening,______I've only just got home.

　　 A.and　　　　 B.so　　　　 C.if　　　　 D.but

25.The West Lake remains______even in such a cloudy day.

　　 A.well　　　　 B.beautiful　　　　　 C.beauty　　　　 D.beautifully