Washoe（16）like a human, too. The scientists keep her in a fully furnished house. After a hard（17）in the lab, 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-the chimpanzee.

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

2．A．for　　B．on 　　C．to 　 D．by

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

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

5．A．human 　　B．sign 　　C．spoken 　　

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