第二节 完形填空(共20小题;每小题1.5分，满分30分)
阅读下面短文，从短文后所给各题的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。
Washoe is a young chimpanzee (黑猩猩). She is no 36 chimpanzee, though. Scientists are doing research 37 her. They want to see how civilized (驯化) she can 38 . Already she can do many things a human being does.
For example, she has been learning how to exchange 39 with people. The scientists are teaching her 40 language. When she wants to be picked 41 , Washoe points up with one finger. She rubs her teeth with her finger 42 she wants to brush her teeth. This is done after every' meal.
Washoe has also been 43 to find answers to problems. Once she was in a 44 with food hanging from the ceiling, It was too high to 45 . After she considered the 46 , she got a tall box to 47 . The food was still too high to be reached. Washoe found a 48 pole. Then she climbed onto the 49 , grasped (抓取) the pole, and 50 down the food with the pole.
Washoe 51 like a human, too. The scientists keep her in a fully furnished house. After a hard 52 in the lab, she goes home. 53 she plays with her toys. She 54 enjoys watching television before going to bed.
Scientists hope to 55 more about people by studying our closest relative—the chimpanzee.
36．A．foolish B．simple C．special D．ordinary
37．A．for B．on C．to D．by
38．A．experience B．change C．develop D．become
39．A．actions B．views C．messages D．feelings
40．A．human B．sign C．spoken D．foreign
41．A．out B．at C．on D．up
42．A．when B．until C．since D．while