摘要： The factory produces half a million pairs of shoes every year.80% are sold abroad. A.of which B.which of C.of them D.of that 答案 A 解析 根据前后两个分句的关系.后一分句是前一分句的定语从句.从而排除选项C.D,再根据部分与整体的表示法.排除B项.故答案选A项.

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