Which phrase completes the sentence with the correct fixed preposition: 'She succeeded ______ convincing the committee.'?
答案解析
**Core Concept**: Vocabulary (fixed preposition collocations).
**Analysis**: The verb 'succeed' requires the preposition 'in' (succeed in doing something).
**Error Check**: A/B/D are incorrect collocations ('succeed at' + noun; 'on/for' are unidiomatic).
正确答案：C