He managed what a smile of satisfaction though it was an unexpected result that came out..

网友回答

A. counted on
(答案→)B. amounted to
C. pensated for
D. majored in
解析：考查动词短语辨析。Amount to发展成…；count on依赖；指望；pensate for补偿…；major in…主修…；句意：尽管这是一个没有预料到的结果，他还是露出了一个满意的微笑。故B正确。