填空题 Although the research is very difficult, his tutor 1(说服他坚持下去)successfully.

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【正确答案】 1、persuaded/talked him into hanging on    
【答案解析】[解析] ①“说服某人做某事”用persuade/talk sb．into doing sth．表示；②“坚持”可用hang on表示，还可用insist on/persist表示。