You'd better not talk about it, ________ about it well.A.to knowB.not to knowC.without knowingD.with knowing
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C解析考查without短语作状语。with /without短语可在句中作状语，且后接名词、代词或v. -ing。如：Without money, I couldn't buy the book. (由于没有钱，我不能买这本书。) Without knowing his address, you can't find him. (如果不知道他的地址，你就找不到他。) 由以上可知选C项，D项不符合句意。