问题描述：
He'll succed because he's always at his books.
at his
A 学识渊博 B 博览群书 C 刻苦学习 D 意志坚强
at his
A 学识渊博 B 博览群书 C 刻苦学习 D 意志坚强
问题解答：
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问题描述：
问题解答：
我来补答