问题补充：
,the more quickly he will learn a foreign language.
A. The stronger motivation will a person have
B. The stronger motivation has a person
C. The stronger motivation a person will have
D. The stronger motivation a person has
答案：
A. The stronger motivation will a person have
B. The stronger motivation has a person
C. The stronger motivation a person will have
(答案→)D. The stronger motivation a person has
解析：后面的句子用的是“the more+副词+陈述句”，那么上句与之对等就要用“the more+名词+陈述句”。第一个分句是表示条件的状语从句，因此状语从句中要用一般现在时代替一般将来时。句意：一个人学习的动机越强，那他学会一门外语的速度就越快。
