Hehadmadeamistake,butwhenhere

发布时间：2020-07-28 13:59:13

He had made a mistake,but when he realized it,he took measures against the possible loss ________ it was too late．A.untilB.whenC.beforeD.as

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C解析解析：据句意可知空白处表达“在……以前”之意。
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