本期节目的topic：一无所知
be completely in the dark一无所知，仍蒙在鼓里 身处于伸手不见五指的黑暗中，非常形象的表达，相信大家不难想象到这个表达的言外之意。
【例句详解】I am completely in the dark concerning their plans.我对他们的计划一无所知。 We were completely in the dark about his plan to sell the company.他计划将公司出售一事, 我们一直都被蒙在鼓里. 同样的意思我们也可以用keep someone in the dark; be left (kept) in the dark来表示: Don't ask me that. I am left in the dark myself.这件事不要问我，我自己也是一无所知。
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