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完形填空
Washoe is a young chimpanzee. She is no 1 chimpanzee, though. Scientists are doing research 2 her. They want to see how civilized 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 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－chimpanzee.
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