In the past few years, he has collected a lot of ancient coins, _______ date back to the Ming and Qing DynastiesA.most of themB.most of thatC.most of whichD.most of those
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C解析考查非限定性定语从句关系代词.that只能用于限定性定语从句中,them和those不能用作定语从句引导词,当指物的引导词前有介词时,引导词只能用which,故选C