Thousands of years ago people discovered the phenomenon by chance, and this was _____ the idea of th...
2023-02-04 23:13:59 57次 20102011年度河北省高三第二学期第一次调研英语卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Thousands of years ago people
discovered the phenomenon by chance, and this was _____ the idea of the compass
first came from.
A.
how B.
what C.
where D. that
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