---Could you give me an explanation ______ your keeping silent throughout the discussion?---Oh, terribly sorry. I had the least idea of what ______. I would have made a plete fool of myself if I had said anything.A.for; was discussedB.of; had discussedC.to; was being discussedD.with; had been discussed
网友回答
C解析第一空填to，因为是固定用法：explain to解释第二空填was being discussed表示“正在被讨论”。句意是：你能解释下为什么讨论时一直沉默吗？--很抱歉，我不知道当时正在讨论的问题，我要是说的话，你会笑话我的。选C。