题目内容：
Although he was ___________in his efforts to persuade us of the justness of his cause, his past history, ___________ with failures, prevented us from being any more than skeptical at his words.
参考答案：
答案解析：
单选题：Although he was ___________in his efforts to persuade us of
- 题目分类：GRE
- 题目类型：单选题
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