9. A. cave　　　 B. zoo　 　　　　　 C. room　　　 　 D. museum

8. A. raised　　 B. trained　　　　 C. ordered　 　 D. led

7. A.when　　　 B. until　 　　　　　 C. since　　　 　 D. while

6. A. out　 　　 B. at　　　 　　　　　 C. on　 　　　 D. up

5. A. sign　　 B. human　　　　　 C. spoken　　 D. foreign

4. A. actions　 B.views　　　　　 C. messages　 D. feelings

3. A. experience B. change　　　　 C. develop　 D. become

2. A. for　　　 B. by　　　　　　 C. to　　　　 D. on

1. A. foolish 　　B. ordinary　　　 C. special　　 D. simple

25.A. easier　 B. more naturalC. better 　　D. more peaceful

　　　　 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 human being can do.

　　　　 For exmaple, 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 reachecd. 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.