完形填空。 In our discussion with people on how education can help them succeed in life, a woman remembered the first meeting of an introductory 1 course about 20 years ago. The professor 2 the lecture hall, placed upon his desk a large jar filled with dried beans (豆), and invited the students to 3 how many beans the jar contained. After 4 shouts of wildly wrong guesses the professor smiled a thin, dry smile, announced the 5 answer, and went on saying, 'You have just 6 an important lesson about science. That is: Never 7 your own senses.' Twenty years later, the 8 could guess what the professor had in mind. He 9 himself, perhaps, as inviting his students to start an exciting 10 into an un- known world invisible (无形的) to the 11 , which can be discovered only through scientific 12 . But the seventeen-year-old girl could not accept or even 13 the invitation She was just 14 to understand the world. And she 15 that her firsthand experience could be the 16 . The professor, however, said that it was 17 . He was taking away her only 18 for knowing and was providing her with no substitute (替代) 'I remember feeling small and 19 .' the woman says, 'and I did the only thing I could do. I 20 the course that afternoon, and I haven't gone near science since.' (     )1. A. art (     )2. A. searched for (     )3. A. count (     )4. A. warning (     )5. A. ready (     )6. A. learned (     )7. A. lose (     )8. A. lecturer (     )9. A. described (     )10. A. voyage (     )11. A. professor (     )12. A. model (     )13. A. hear (     )14. A. suggesting (     )15. A. believed (     )16. A. growth (     )17. A. firm (     )18. A. ask (     )19. A. cruel (     )20. A. dropped B. history B. looked at B. guess B. giving B. possible B. prepared B. trust B. scientist B. respected B. movement B. eye B. senses B. make B. beginning B. doubted B. strength B. interesting B. tool B. proud B. started C. science C. got through C. report C. turning away C. correct C. taught C. sharpen C. speaker C. saw C. change C. knowledge C. spirit C. present C. pretending C. proved C. faith C. wrong C. success C. frightened C. passed D. math D. marched into D. watch D. listening to D. difficult D. taken D. show D. woman D. served D. rush D. light D. methods D. refuse D. waiting D. explained D. truth D. acceptable D. connection D. brave D. missed