单项选择题
A．he didn't live very long with them B．the family was extremely large C．he was too young when he lived with them D．he was fully occupied with observing natur
A．was interested in flowers and insects in his childhood B．lost his hearing when he was a child C．didn't like his brothers and sisters D．was born to a naturalist's family
A．full of ambition B．knowledgeable C．full of enthusiasm D．self-disciplined