为帮助大学生学到权威的英语知识，本网站特提供以下资料：
41. He ____have been nervous because he didn’t go straight in.
A. ought to B. mustC. should D. had to
42. I am quite sure that I can ____ Michael into letting us use his car tomorrow.
A. speak B. talk C. tell D. say
43. Jean could be a very attractive girl but she____to her clothes.
A. pays no attention B. was paying no attention C. paid no attention D. had paid no attention
44. When questioned by the interviewer, my mind went____, and I could hardly remember my own date of birth.
A. blank B. dim C. faint D. vain
45. The textbook question as well as other issues is going to be discussed when the congress is in____again next spring.
A. assembly B. convention C. conference D. session
46. To drive a car safely, it is____good brakes.
A. essential with B. essential having C. essential to have D. essential have
47. As I regard it, you can widen the ____ of these improvements through your active participation.
A. volume B. dimension C. magnitude D. scope
48. “Can you ride a horse?”“No, I never had the chance ____.”
A. for learning B. for learning how C. how to learn it D. to learn how
49. As electric lines were destroyed by the storm, they were forced to light for several days.
A. go over B. go in for C. go without D. go out
50. To survive in the intense market competition, we must____the qualities and varieties of products we make to the world-market demand.
A. improve B. guarantee C. gear D. enhance
51. “Maria has blisters in her boots.”“She____walking such a long distance.”
A. was used not to B. used to C. is not used to D. did not used to