题目内容
【题目】It worried her a bit _____ her hair was turning grey.
A．while B．if C．that D．whether
【答案】C
【解析】句意：她的头发变得灰白，这让她有点焦急。这里句首的it是形式主语，真正的主语是后面的her hair was turning grey，that只起连接作用，没实际意义。
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题目内容
【题目】It worried her a bit _____ her hair was turning grey.
A．while B．if C．that D．whether
【答案】C
【解析】句意：她的头发变得灰白，这让她有点焦急。这里句首的it是形式主语，真正的主语是后面的her hair was turning grey，that只起连接作用，没实际意义。
