单项选择题
A．worked in an office B．worked in a factory C．lived in the wild D．observed and studied animals
A．he thought that they were the best friends of humans' B．he believed that prehistoric people might live a life similar to the life chimps lived now C．he loved the animals D．the chimpanzees were very shy
A．why modem dance is popular B．how to train new modern dancers C．the development of Ballet Rambert D．the development of modern dance