—Was her father very strict with her when she was at school?
—Yes. He had never praised her ______ she became one of the top students in the grade.

【正确答案】 C

【答案解析】 考查状语从句。until与否定词连用，意为“直到……才……”。句意：——她上学的时候她爸爸对她很严格吗?——是的。她只有成为班级的尖子生她爸爸才夸奖她。