41. The proportion of men to women in the population ______ so that there are now fewer women and more men.
A. changed B. change
C. have been changed D. has changed
42. Never before ______ seen anybody who can play tennis as well as Robert.
A. had she B. she had C. has she D. she has
43. The school’s system of serving lunch needs ______. It is too slow.
A. to reorganize B. reorganized
C. being reorganized D. reorganizing
44. Although many people view conflict as bad, conflict is sometimes useful ______ it forces people to test the relative merits of their attitudes and behaviors.
A. by which B. to which C. in that D. so that
45. ______ Newton was to mechanics and Darwin to biology, Freud was to psychology.
A. What B. Who C. That D. Which