—I have worked hard at math, but it seems that I haven’t made any progress. —Keep on _____ at it, an...
2023-02-23 10:20:26 111次 2012届福建省漳州正兴学校初三期中考试（上）英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
—I have worked hard at math, but it seems that I haven’t made any
progress.
—Keep
on _____ at it, and you will be successful.
A.
work B.
working C.
to work
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