Washoe is a young chimpanzee(黑猩猩). She is no ___1___ chimpanzee, though. Scientists are doing a research ___2___ her. They want to see how civilized(驯化) she can ___3___. Already she does many things a human being can do. For example, she has been learning how to exchange ___4___ with people. The scientists are teaching her ___5___ language. When she wants to be picked ___6___, Washoe points up with one finger. She rubs her teeth with her finger ___7___ she wants to brush her teeth. This is done after every meal. Washoe has also been ___8___ to think out and find answers to problems. Once she was put in a ___9___ with food hanging from the ceiling. It was too high to ___10___. After she considered the ___11___, she got a tall box to stand ___12___. The food was still too high to be reached. Washoe found a ___13___ pole. Then she climbed onto the ___14___, grasped the pole, and ___15___ down the food with the pole. Washoe ___16___ like a human, too. The scientists keep her in a fully furnished(家具齐全的) house. After a hard ___17___ in the laboratory, she goes home. ___18___ she plays with her toys. She ___19___ enjoys watching television before going to bed. Scientists hope to ___20___ more about people by studying our closest relative(亲属) — chimpanzee. 1. A. foolish   B. ordinary     C. special       D. simple 2. A. for  B. by      C. to       D. on 3. A. experience     B. change       C. develop      D. become 4. A. actions   B. views  C. messages    D. feelings 5. A. sign       B. human       C. spoken       D. foreign 6. A. out B. at       C. on      D. up 7. A. when     B. until   C. since   D. while 8. A. raised     B. trained       C. ordered      D. led 9. A. cave       B. zoo     C. room  D. museum 10. A. pull      B. see      C. eat      D. reach 11. A. problem       B. position      C. food   D. ceiling 12. A. by B. on      C. up      D. with 13. A. straight B. strong C. long    D. big 14. A. wall     B. box     C. ceiling       D. pole 15. A. knocked      B. picked C. took    D. shocked 16. A. lives     B. acts     C. thinks D. plays 17. A. task      B. lesson C. day     D. time 18. A. Here    B. There  C. So      D. Then 19. A. quite    B. already       C. even   D. still 20. A. observe       B. discover     C. gain    D. learn