54. A. money B. pleasure C. joy D. noise
53. A. clean B. help C. sweep D. pollute
52. A. problems B. questions C. pollution D. replies
51. A. much B. more C. many D. most
50. A. give B. show C. see D. keep
49. A. Whenever B. Wherever C. Whatever D. Whoever
48. A. take B. pay C. cost D. spend
47. A. just B. ever C. still D. yet
46. A. in order to B. so that C. because D. however
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