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【单选题】Michael Faraday made a great discovery ______ that electricity could be made to flow in a coil (一卷) of wire.
A．when he found
B．to find
C．was found
D．he found
网考网参考答案：A
网考网解析：
此处为when引导的时间状语从句。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>