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问题: 一道单选题目,翻译一下

Jim’s brother is junior ________me ________several years, so I always instruct him how to learn maths well.
A. to ;by B. on; for C. to; in D. of;by

解答:

Jim的弟弟比我小几岁,所以我经常教他如何学好数学。
可能选A吧?