52. A. until B. before C. since D. when
51. A. calling B. call C. to call D. called
50. A. gas B. tea C. strength D. energy
49. A. answered B. explained C. refused D. promised
48. A. like B. love C. used to like D. liking
47. A. consider B. understand C. accept D. think
46. A. Gas B. Coffee C. Tea D. Lunch
45. A. asking B. looking C. calling D. waiting
44. A. came B. answered C. opened D. appeared
43. A. street B. path C. way D. road