The stronger the is the more quickly a man will learn a new skill. In other words it is

问题补充：

The stronger the is, the more quickly a man will learn a new skill. In other words, it is up to whether he has an interest in it.

A. ambition

B. inspiration

C. aspiration

D. motivation

答案：

A. ambition

B. inspiration

C. aspiration

(答案→)D. motivation

解析：名词辨析。A雄心，野心；B灵感；C热望,志向,抱负；D激励；动机；句意：动机越强，人们就越快的学会新技巧。