题目内容：

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_______course about 20 years ago.
The professor _____the lecture hall, placed upon his desk a large jar filled with dried beans（豆）, and invited the students to ______ow many beans the jar contained. After ______shouts of wildly wrong guesses, the professor smiled a thin, dry smile, announced the _____ answer, and went on saying, ”You have just ______an important lesson about science. That is Never______ your own senses.”
Twenty years later, the ____could guess what the professor had in mind. He _____himself, perhaps, as inviting his students to start an exciting ______into an unknown world

Invisible（无形的）to the ___  ,which can be discovered only through scientific___ .But the seventeen-year-old girl could not accept or even ___ the invitation. She was just ____ to understand the world. And she ____ that her firsthand experience could be the ___ .The professor, however, said that it was ___.He was taking away her only ____ for knowing and was providing her with no substitute. “I remember feeling small and ___ ,”the women says, “and I did the only thing I could do. I ___ the course that afternoon and I haven’t gone near science since.”

1.A. artB. historyC. scienceD. math

2.A. searched forB. looked atC. got throughD. marched into

3.A. countB. guessC. reportD. watch

4.A. warning ofB. giving outC. turning awayD. listening to

5.A. readyB. possibleC. correctD. difficult

6.A. learnedB. preparedC. taughtD. taken

7.A. loseB. trustC. sharpenD. show

8.A. lecturerB. scientistC. speakerD. woman

9.A. describedB. respectedC. sawD. served

10.A. voyageB. movementC. changeD. rush

11.A. professorB. eyeC. knowledgeD. light

12.A. modelB. sensesC. spiritD. methods

13.A. hearB. makeC. presentD. refuse

14.A. suggestingB. beginningC .pretendingD. waiting

15.A. believedB. doubtedC. provedD. explained

16.A. growthB. strengthC. faithD. truth

17.A. firmB.interestingC. wrongD. acceptable

18.A. taskB. toolC. successD. connection

19.A. cruelB. proudC. frightenedD. brave

20.A. droppedB. startedC. passedD. missed