31. ______ he works hard, I don’t mind when he finishes the experiment.
　　A. As soon as B. As well as C. So far as D. So long as
　　32. Although he knew little about the large amount of work done in the field, he succeeded ______ other more well-informed experimenters failed.
　　A. which B. that C. what D. where
　　33. I’m sure he is up to the job ______ he would give his mind to it.
　　A. if only B. in case C. until D. unless
　　34. The British are not so familiar with different cultures and other ways of doing things, ______is often the case in other countries.
　　A. as B. what  C.  so  D. that
　　35. The course normally attracts 20 students per year, ______ up to half will be from overseas.
　　A. in which B. for whom C. with which D. of whom
　　36. A survey was carried out on the death rate of new-born babies in that region, ______ were surprising.
　　A. as results B. which results C. the results of it D. the results of which
　　37. ______ the calculation is right, scientists can never be sure that they have included all variables and modeled them accurately.
　　A. Even if B. As far as C. If only D. So long as
　　38. These two areas are similar ______ they both have a high rainfall during this season.
　　A. to that B. besides that C. in that D. except that
　　39. We’ll visit Europe next year ______ we have enough money.
　　A. lest B. until C. unless D. provided
　　40. I was advised to arrange for insurance ______ I needed medical treatment.
　　A. nevertheless B. although C. in case D. so that

　　41. I hope all the precautions against air pollution, ______ suggested by the local government, will be seriously considered here.
　　A. as B. since C. after D. while
　　42. ______ you are leaving tomorrow, we can eat dinner together tonight.
　　A. Since  B. For C. Before D. While
　　43. Although Anne is happy with her success she wonders ______ will happen to her private life.
　　A. that B. what C. it D. this
　　44. We agreed to accept ______ they thought was the best tourist guide.
　　A. whatever B. whomever C. whichever D. whoever
　　45. Beer is the most popular drink among male drinkers, ______ overall consumption is significantly higher than that of women.
　　A. what B. which C. that D. whose
　　46. There are signs ______ restaurants are becoming more popular with families.
　　A. that B. which C. in which D. whose
　　47. I think I was at school, ______ I was staying with a friend during the vacation when I heard the news.
　　A. or so  B. and then C. or else D. even so
　　48. The fire was finally brought under control, but not ______ extensive damage had been caused.
　　A. since B. before  C. after D. as
　　49. Rod is determined to get a seat for the concert ______ it means standing in a queue all night.
　　A. provided B. whatever  C. even if D. as if
　　50. We hadn’t met for 20 years, but I recognized her ______ I saw her.
　　A. at the moment when B. for the moment
　　C. the moment when D. the moment