完形填空。 My first performance in front of an audience was coming up soon. I tried as hard as I could to remain (保持) 1 , but I had an empty feeling in my stomach. I stared down at my sweat covered, 2 hands. I looked up again at the audience, realizing that these were 3 people. They were not just my mum and dad, who 4 say, 'Good job!' even if I messed up the entire piece. What if I had the wrong music? What if I played the wrong notes? As it 5 , I was never able to answer these questions because the spotlight was 6 for me. I grasped my hands tightly together, drying off the sweat. Slowly I walked to the mulberry piano in the 7 of the room. It contained 88 demanding keys, which were waiting impatiently to be played. I swallowed the golf ball-sized lump (隆起的) in my throat and sat down. 8 , I opened the music. Next, I rested my still shaking hands on the ivory keys. As my fingers played across the keys, I was becoming more 9 of my preparation for this moment. But the memory of my year of training came flooding back. I knew that I had practiced this piece 10 that I could play it backwards if 11 . Although at one point I accidentally played two keys 12 the intended (预先, 打算的) ones, I continued to move my fingers automatically (自动的). My eyes burned holes into the page in front of me. There was no 13 that I was going to lose my concentration. To keep this promise to myself, I leaned (倾斜) 14 and focused carefully on the music. 15 I came to the end of the page, a warning 16 inside my head: DON'T MAKE A MISTAKE WHEN YOU TURN THE PAGE! Needless to say, I 17 myself with all my heart and mind. And, proud of my 'page- turning' feat (技艺) I finished the 18 of the piece without making a single mistake. After the final note died away, a celebration went into action 19 my head.I had finished. I had mastered (征服) the 20 . (     )1. A. unknown (     )2. A. shaking (     )3. A. true (     )4. A. will (     )5. A. turned out (     )6. A. looking (     )7. A. corner (     )8. A. Slowly (     )9. A. sure (     )10. A. so much time (     )11. A. requested (     )12. A. in spite of (     )13. A. way (     )14. A. backward (     )15. A. Then (     )16. A. appeared (     )17. A. told (     )18. A. other (     )19. A. inside (     )20. A. musical B. still B. moving B. real B. can B. turned up B. searching B. cross B. Happily B. unsure B. so hardly B. told B. instead of B. need B. forward B. Next B. had B. asked B. part B. outside B. piece C. calm C. waving C. young C. could C. turned back C. expecting C. center C. Quickly C. certain C. such a lot of time C. demanded C. in the way of C. use C. upward C. When C. raised C.obeyed C. left C. out of C. impossible D. quiet D. wandering D. old D. would D.turned down D. waiting D. passage D. Suddenly D. confident D. so many times D. ordered D. in the form of D. sense D. downward D. While D. went D.refused D. rest D. on D. possible