Question

【题目】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 whom

Answer 1

【答案】A

【解析】考查定语从句。由结构判断后面是非限制性定语从句，排除C选项，而B选项形式错误，D项whom指人，应该是指物用which，故答案为A。句意：这家工厂每年生产五十万双鞋，其中80%都被销售到了国外。