__ men have learned much from the behavior of animals is hardly new.A.That B.Those C.What

题目

__ men have learned much from the behavior of animals is hardly new.A.That B.Those C.What
D.Whether 为什么不选C?并翻译句子.

答案

人们从动物的行为身上学到很多事情（men have learned much from the behavior of animas） 已经不是新鲜事儿了(is hardly new) 已经是一个完成的句子 直接加上That用其引出 如果换一个句子 what man can learn from...