31. A high public tolerance for - and low public awareness of - noise pollution has provided bus video advertisers with a paradise ______ their businesses.

　A. in which to expand　　　　　　 B. which to expand in

　C. where to expand　　　　　　　 D. that they expand in

30. Sino-US relations have made remarkable progress over the past three decades and this has linked the two countries ______.

　A. closely　　　 B. closed　　　　　 C. close　　　　　　　 D. closer

29. Generally speaking, parents prefer to rent a house near a school ____ the year rather than monthly in order to accompany their children for long.

　　 A. within　　　　 B. by　　　　　　 C. during　　　　　　　 D. in

28. Mr. King, _____ car the little boy goes to kindergarten every day is his fellow friend’s father.

　　 A. whose　　　　 B. in whose　　　　　 C. which　　　　　 　　D. in which　

27. --- Look out for the door.

　　 --- Why?

　　 --- Bill ______ the door.

　　 A. has painted　　　 B. was painting　　 C. has been painting　　 D. painted

26. The majority of people here agree that there _____ a bus stop near the house will be a great advantage.

　　 A. was　　　　 B. have been　　　　　 C. having been　　　　　 D. being

25. Next time you have to prepare a speech, try applying one or more of these techniques and see if you have_____ it takes to be a winning speechwriter.

　A. what　　　　 　 B. which　　　　 C. how　　　 　　D. that

24. ________ the latest estimates, insects account for probably 4 to 6 million of the species of creatures living on the planet.

　A. Owing to　　 　 B. According to　 　 C. In spite of　　 　 D. In case of

23. The first time Johnson went to Spain, he managed to make himself ____ with his ____ Spanish.

　A. understand; broken　　　　　　　 B. understood; break　

　C. understood; broken　　　　　　　　　 D. understand; break

22. --- I bet someone stole my backpack.

　　 --- Well, you _____ have kept an eye on it.

　　 A. may　　　　 B. can　　　　 C. would　　　　 　 D. should