◎ 题干
— Was his father strict with him when he was at school? 
— Yes. He had never praised him ______ he became one of the top students in his grade.

A. after
B. unless
C. until
D. when
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—Was his father strict with him when he was at school?— Yes. He had never praised him ______ he became one of the top students in his grade. [ ]A. after B. …”主要考查了你对  【从属连词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。