50. I called _____ his house, but he wasn't in. Then I called _____ him, but I couldn't get through, either.

　　　 A. at; on　　　 B. on; on　　　　　 C. at; up　　　　 D. on; at

49. After three years of hard work, they had at last paid ______ all the money they had borrowed.

　　　 A. for　　　　　 B. out　　　　　　 C. in　　　　　　 D. back

48. His careless driving ______ him his life last year.

　　　 A. cost　　　　 B. spent　　　　　 C. paid　　　　　 D. took

47. What surprised us was that he ____ his shooting skill against the experts.

　　　 A. matched　　　 B. fitted　　　　　 C. showed　　　　 D. made

46. The weather will ________ fine, I think.

　　　 A. go on　　　　 B. keep on　　　　 C. carry on　　　 D. continue

45. The passenger was tired and walked more slowly but he got home _____.

　　　 A. after all　　 B. at all　　　　　 C. above all　　 D. in all

44. He gladly _______ the offer to teach the school.

　　　 A. promised　　 B. agreed　　　　　 C. received　　　 D. accepted

43.--Oh, it's you! I _______ you.

　　 -- I've just had my hair cut, and Fm wearing new glasses.

　　　 A. didn't recognize　　　　　　　　 B. hadn't recognized

　　　 C. haven't recognized　　　　　　　 D. don't recognize

42. -- What do you think of the book?

　　　 --Oh, excellent. It's worth _______ a second time.

　　　 A. to read　　　 B. to be read　　 C. reading　　　 D. being read

41. I called ______ his office yesterday, but he wasn't in, so 1 left a note saying that I would call _______ him the next day.

　　　 A. on; on　　　　 B. at; at　　　 　C. on: at　　　　 D. at; on