Section B: Fill in the blanks with the words given in brackets. Make changes or add something where necessary. （共20小题，每小题1分，共20分）
29. Looking into crime and violence in the United States is like ______ (open) the proverbial can of worms.
30. We must now ______ (conclude) with further aspects of lateral and vertical thinking.
31. I had a chance to go out with a friend who ______ (take) a climbing course before he entered the university.
32. When might a doctor ______ (choose) not to tell a patient the truth?
33. Salads are good for you and you ______ (not have) to cook them.
34. The workers ______ (build) the bridge this time last year.
35. It’s only natural ______ (think) that through humor two different cultures could find some common ground.
36. Children have a natural ______ (curious) about the world around them.
37. Attractive men are ______ (confident) than less attractive men.
38. Every man and woman, old or young, ______ (be) required to take the inoculation.
39. Mr. Smith is responsible ______ (hire) painters for the company.
40. When we listen, we actually ______ (listen) a purpose.
41. Pubs are places ______ (which) people of all ages and social classes mix to talk.
42. I’d like to have these ______ (fragile, porcelain, Chinese) vases sent by special delivery.
43. She rarely visits her parents these years, ______ (she) ?
44. It’s so noisy here. Somebody ______ (turn) down the radio.
45. As a Christian, Mary’s mother goes to ______ (church) every Sunday morning.
46. My younger sister has to practice ______ (play) piano for hours every day for she will take part in a competition next month.
47. I don’t know ______ (who) I ought to address the request.
48. The old worker is retiring and the factory needs a younger ______ (take) over.
