单项选择题
The author can't remember his relatives clearly because（）
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
单项选择题 It can he inferred from the passage that the author was（）
单项选择题 According to the author, a born naturalist should first of all be（）
单项选择题 The author says that he is a naturalist rather than a scientist probably because he thinks he （）
