54. A. wondered B. knew C. promised D. Noticed
53. A. looked at B. laughed at C. listened to D. wrote to
52. A. normal B. extra C. usual D. last
51. A. after B. until C. unless D. while
50. A. prepare B. deliver C. order D. provide
49. A. nor B. or C. if D. as
48. A. five B. eight C. nine D. Ten
47. A. idea B. work C. answer D. Solution
46. A. research B. examine C. teach D. Wait
45. A. When B. Where C. How D. Why
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