34. The year 2002 ______ remarkable changes in Shanghai’s landscape.

　 　A. sees　　　 B. has seen　　　 C. saw　　　　　 D. had seen

33. ---English has a large vocabulary, hasn’t it?

　 ---Yes. ______ more words and expressions and you will find it easier to read and communicate.

　 　A. Know　　 B. Knowing　　　 C. To know　　　 D. Known

32. The boy was criticized for forgetting ________ his textbook to school.

A. bringing　　 B. to bring　　 C. having brought　　 D. to have brought

31. ---Catherine, I have cleaned the room for you.

　 ---Thanks. You ______ it. I could manage it myself.

　 A. needn’t do　　　　 B. needn’t have done

　 C. mustn’t do　　　　 D. mustn’t have done

30. With a lot of difficult problems ______, the manager felt worried all the time.

　　A. to settle　　 　　B. settling　　　　　 C. settled　　　　 D. being settled

29. _______ I can see, there is only one possible way to keep away from the danger.

　 　A. As far as　　 　B. As long as　　　 C. As well as　　　 D. As a result of

28. The reason why many rivers in this area have ______ recently is that too many trees have been cut down.

　　A. stood out　 　　B. dried out　　　 C. dried up　　　　 D. stuck out

27. People hadn’t been ______ the existence of the plant until a famous biologist mentioned in his book.

　　A. afraid of 　　　B. ahead of　 　　　C. aware of　　　　 D. free of

26. The old couple are working hard to earn money, but spend a little ______ some for their future life.

　 　A. setting aside　　 B. to set aside　　 C. setting up　　　 D. to set up

25. The flu is believed _______ by viruses that like to reproduce in the cells inside the human nose and throat.

　 　A. causing 　　B. being caused　　 　C. to be caused　 　D. to have caused