______ is well known to everyone, I should say, is that a man becomes learned by asking questions. A...
2022-12-12 23:24:38 72次 2014届福建罗源县第一中学高二下学期月考英语卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
______ is well known to everyone, I should say, is
that a man becomes learned by asking questions.
A．Who B．It C．As D．What
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