Classification gives significance【C1】______unrelated and consequently meaningless【C2】_____

Classification gives significance【C1】______ unrelated and consequently meaningless【C2】______. It is one of the【C3】______ fundamental processes【C4】______ on by the human【C5】______. When a baby learned to【C6】______ all the various "faces" presented by【C7】______ mother smiling, frowning, sad, tired, and laughing-and to【C8】______ his mother from all【C9】______ people, he has completed a task in【C10】______.

【C11】______ any formal instruction, as one【C12】______ up, he reduces all the infinite variety of his environment to groups【C13】______ subgroups. Any boy will identify a leaf【C14】______ a tree without【C15】______. It is similar【C16】______, and different from, millions of other【C17】______. If it were necessary to consider each leaf【C18】______ an individual object the mind would be left【C19】______ absolute confusion. A man would【C20】______ his whole life examining leaves.

No matter which way a man turns to, he finds the universe divided, classified, and grouped by this natural inclination of the human mind.

【C1】

A．about

B．to

C．for

D．in