48. I have not found my book yet. I'm not sure ____ I could have done with it.

　　A) whether B) what C) why D) where

　　49. I left very early last night, but I wish I ____ so early.

　　A) didn't leave B) hadn't left C) haven't left D) couldn't leave

　　50. I'd get it for you ____ I could remember who last borrowed it.

　　A) except thatB) on condition that C) if only D) considering whether

　　51. I did not call to make my airline reservation, but I ____.

　　A) should have B) may have C) must have D) shall have

　　52. He is sure that there was a flying saucer over there. If he hadn't seen it himself, he ____ it.

　　A) never have believed B) never did believe C) could never believeD) would never have believed

　　53. I guess Jones didn't have a chance to win the election. ____ the people in the city voted for his opponent.

　　A) Most all of B) Most of all C) Almost all of D) Almost the whole of

　　54. The cottage will be cold. Make sure ____ the heater.

　　A) you light B) for lighting C) lighting D) you'll light

　　55. There are times when the ____ on the road to success prevent our reaching our goals.

　　A) barriers B) blocks C) boundaries D) accidents

　　56. Persons of all ages are ____ to enjoy the country's medical care.

　　A) asked B) entitled C) willing D) required

　　57. The Indian guide ____ the danger ahead on the muddy, wet road.

　　A) ignored B) heard about C) warned D) foresaw

　　58. At the gathering, he talked ____ about the matter, dampening everyones spirits.

　　A) in detail B) with ease C) on end D) in a confusing way

　　59. His ____ and experience make him an excellent person for this job.

　　A) complacency B) compensation C) cooperation D) capability

　　60. During the strike, the electricity was cut off for hours, so we had to ____ candles for lighting.

　　A) manage with B) turn on C) carry out D) keep to

　　61. Susan must ____ quite well on the exam since she seems so confident of passing.

　　A) do B) have been doing C) be done D) have done

　　62. “How many from your class went abroad?” “ ____ but one”.

　　A) Any B) Some C) All D) Most

　　63. I wish Bill would drive us to the train station but he has ____ to take us all.

　　A) very small a car B) too small a car C) a too small car D) such a small car

　　64. Astronomers were glad to know that their ____ about the moon were correct.

　　A) suppositions B) descriptions C) philosophy D) summarization

　　65. Lucille has been feeling ____ recently.

　　A) under the weatherB) in the weather C) cold D) isolated

　　66. Unwise judgment and bad management caused the small company to ____.

　　A) set another record B) reduce its production C) go broke D) go down

　　67. Each day in summer, teenagers go to the beach, hoping to ____ a beautiful tan.

　　A) lose B) help C) bathe D) acquire

　　68. Heating ____ into the students' dormitories now.

　　A) is putting B) is being put C) is been put D) has been putting

　　69. We know that Mr.Smith has an extremely tight schedule, but we believe he should have ____ time at least for his supporters.

　　A) a little B) one C) little D) a