完形填空。 The passengers on the bus watched sympathetically as the attractive young woman with the white cane made her way carefully up the steps. She 1 the driver and, using her hands to feel the 2 of the seats, walked down and found the 3 which the driver had told her was empty. Then she settled in. It had been a year since Mary, 34, 4 a medical misdiagnosis (误诊), was suddenly thrown into a world of 5 . Mark, her husband, was an Air Force officer and he loved Mary with all his heart. He 6 her how to rely on her other 7 , specifically her hearing, to determine where she was and 8 to adapt herself to the new environment. He helped her befriend the bus drivers who could 9 for her, and save her a seat. 10 , Mary decided that she was ready to try the 11 on her own. Monday morning, she said good-bye and for the first time, they went their 12 ways. On Friday morning, Mary took the bus to work as usual. As she was 13 the bus, the driver said, 'Boy, I 14 envy you. ' Mary had no 15 what the driver was talking about, and asked, 'What do you 16 ?' The driver answered, 'You know, every morning for the 17 week, a fine-looking gentleman 18 a military uniform has been standing across the corner 19 you as you get off the bus. He 20 you cross the street safely and he watches until you enter your office building. You are one lucky lady. ' Tears of gratitude poured down Mary's cheeks. (     )1. A. thanked (     )2. A. location (     )3. A. ticket (     )4. A. according to (     )5. A. anger (     )6. A. asked (     )7. A. feelings (     )8. A. how (     )9. A. make out (     )10. A. Finally (     )11. A. visit (     )12. A. opposite (     )13. A. getting on (     )14. A. must (     )15. A. idea (     )16. A. want (     )17. A. next (     )18. A. by (     )19. A. searching (     )20. A. looks out B. asked B. shape B. bus B. instead of B. darkness B. encouraged B. sights B. when B. watch out B. Luckily B. trip B. separate B. getting in B. may B. opinion B. mean B. old B. on B. watching B. takes up C. discovered C. size C. seat C. thanks to C. happiness C. taught C. senses C. where C. find out C. However C. bus C. difficult C. getting off C. will C. way C. say C. past C. with C. calling C. believes in D. paid D. cost D. bag D. due to D. light D. praised D. abilities D. who D. work out D. Besides D. work D. usual D. getting up D. do D. thought D. suggest D. following D. in D. noticing D. makes sure