完形填空。 Scientific research has a great influence on our society. 1 the one hand, we 2 to provide the research work a free 3 .While on the other hand, we are afraid that some of the research will be 4 to our society. Thus, there should be a balance 5 the government whether or not to 6 scientific research and development. 7 the scientific research is a job 8 , it is hard for the government even the public to decide whether or not a research is 9 . But the scientific research, 10 something else, can't go without creativity. 11 , as we all know, should not be limited. If we 12 , we will find 13 far-reaching research work came from free thinking, of which the 14 ideas may seem fantastic at the beginning. Take Einstein 15 example. He 16 the Theory of Relativity. His raw idea of the 17 was considered meaningless by the public. No one at that time was able to 18 that this fantastic idea would lead to a 19 revolution for Physics. 20 , free thinking without limit can encourage creativity to some extent (从某种程度上). This is of great importance to the scientific research. (    )1. A. On (    )2. A. advised (    )3. A. space (    )4. A. good (    )5. A. on (    )6. A. limit (    )7. A. For (    )8. A. in advance (    )9. A. value (    )10. A. as (    )11. A. Create (    )12. A. look  back (    )13. A. a good many (    )14. A. wonderful (    )15. A. in (    )16. A. keep up with (    )17. A. theory (    )18. A. tell (    )19. A. bad (    )20. A. Thus B. In B. are advised B. room B. harmful B. in B. improve B. When B. in an advance B. valuable B. as for B. Creativity B. look out B. a great deal of B. great B. for B. catch up with B. suggestion B. say B. rude B. However C. At C. advise C. atmosphere C. benefit C. for C. block C. Now that C. in the advance C. helpless C. like C. Creative C. look into C. a good few C. terrible C. at C.  put up with C. thinking C. speak C. global C. And D. With D. advising D. discussion D. harm D. with D. puzzle D. As soon as D. in advances D. useless D. unlike D. Creator D. look after D. a good little D. raw D. from D. came up with D. advice D. read D. terrible D. But