46. A. often B. occasionally C. hardly D. never
45. A. When B. Because C. Since D. Until
44. A. cooperate B. compare C. combine D. promise
43. A. How many B. How much C. How often D. How old
42. A. something B. anything C. everything D. nothing
41. A. exhausted B. disappointed C. embarrassed D. annoyed
40. A. went B. flew C. happened D. came
39. A. easier B. harder C. better D. worse
38. A. and B. but C. while D. or