The factory produced many kinds of bikes, none of ___ __ shipped to foreign countries.A.themB.whichC.thatD.what
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A解析考查独立主格结构。两部分之间没有连接词，说明逗号后面的部分不是句子，是短语。是独立主格结构。独立主格结构none of them shipped to foreign=none of which was shipped to foreign countries.故A正确。