42. We booked rooms at the hotel ________we should find no vacancies on our arrival.

　　A) whenever C) since

　　B) if D) lest

　　43. Modern forms of transportation and communication have done much to ________the isolation of life in Alaska.

　　A) break through C) break into

　　B) break down D) break out

　　44. We know through painful experience that freedom is never by the oppressor; it must be ________by the oppressed.

　　A) demanded C) required

　　B) commanded D) requested

　　45. Color and sex are not relevant ________whether a person is suitable for the job.

　　A) on C) to

　　B) for D) with

　　46. ________the enormous flow of food from the entire globe, these countries have for many years not felt any population pressure.

　　A)Thanks to C) In line with

　　B) By means of D) With regard to

　　47. Research universities have to keep up with the latest computer and scientific hardware ________price.

　　A) On account of C) in addition to

　　B) regardless of D) not to mention

　　48. Three university departments have been ________ $600,000 to develop good practice in teaching and learning.

　　A) promoted C) secured

　　B) included D) awarded

　　49. The rapid development of communications technology is transforming the ________in which people communicate across time and space.

　　A) mood C) manner

　　B) mission D) vision

　　50. Mr. Jones holds strong views against video games and ________the closing of all recreation facilities for such games.

　　A) assists C) advocates

　　B) acknowledges D) admits

　　51. Workers in the fine arts ________thoughts and feelings through their creative works.

　　A) transmit C) convey

　　B) elaborate D) contribute

　　52. Small as it is, the ant is as much a creature as ________all other animals on earth.

　　A) are C) is

　　B) do D) have

　　53. The policeman declared that the blow on the victim's head ________from behind.

　　A) should have been made C) would have been made

　　B) must have been made D) ought to have been made