40. Once harm ______ to the environment, it takes years to have the system recovered.

A. does　　　　　　　　　 B. is done　　　　　　　 　 C. will be done　 　 　　D. be done

39. Staying in a hotel in Shanghai one day costs ____ renting a house in my hometown for a week.

A. the three times price of　　 　　　　　 　B. three times the price of

C. as much as three times　　 　　　　　　　　　　 　D. as much three times as

38. Ted and his friends established a website offering useful information about thunderstorms ______ similar accidents happening.

A. prevent　　　　　　　　　　 B. preventing　　　　 　 C. to prevent 　　　　　 　D. prevented

37. I don’t understand how you got a ticket. I always 　　　　　you 　　　　a careful driver.

A. think; are　　　　　　 B. am thinking 　　　　 C. thought; were 　　　　 D. think; were

36. ______, a small advertisement held my attention, which read “Easy job. Good wages. No experience necessary.”

A. Looking through the newspaper　　　　 　 B. While I was looking through the newspaper

　 C. To look through the newspaper　 　　　D. I was looking through the newspaper

35. ______ it is true that a student’s most important goal is to do well in his or her studies, it doesn’t need to be the only goal.

A. When　　 　　　　 B. As　 　　　　　 　　　 　C. While 　 　　　 　D. Before

34. 　　　of danger in the street at night, she had to go home with a friend 　　　　her.

　 　A. Warned; accompanied 　　　　　　　B. Having warned; accompanying

C. Warning; accompanying　　　　　　　　　 　 D. Having been warned; accompanying　　

33. Why were you driving so fast? You　　 somebody.

　 　A.mingt hurt　　　　　 B.might have hurt　 　 C.would hurt　　　 D.must have hurt

32. Exciting as its special effects are 　　,there is too much violence in the film.

A.to watch　　　　　　　　　　 B.to be watched　　 　 C.watching　　 　 　D.being watched

31. 　　　　 , the sun was rising in the east.

A.Arriving there　　　 B.We arriving there　　　 　 C.Having arrived there　 　D.We arrived