职教组卷基于海量职教高考试题库建立的在线组卷及学习系统
职教组卷
  • 题型:英语知识运用 题类:历年真题 难易度:中档

    He always keeps an eye on shortcomings of his brother’s _________ refusing to admit his own mistakes.

    A. but B. while C. although D. though
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