53. A. headed B. looked C. searched D. walked
52. A. and B. unless C. but D. so
51. A. house B. store C. office D. closet
50. A. first B. exact C. only D. single
49. A. Things B. Times C. Manners D. Tastes
48. A. opposite B. slight C. unbridgeable D. unthinkable
47. A. belonged B. talked C. came D. happened
46. A. worried B. satisfied C. proud D. nervous
45. A. because B. though C. until D. as
44. A. big B. tight C. cheap D. expensive