Question

【题目】This factory produces about one million pairs of shoes each year, 60% ________ are sold abroad.

A. of them B. of that C. of whom D. of which

Answer 1

【答案】D

【解析】本题定语从句的先行词是one million pairs of shoes，关系代词which指代先行词。A项不是定语从句，whom的先行词必须是人，that不能放在介词的后面。句意：每年这家工厂生产大约100万双鞋子，其中百分之60销往海外。故D项正确。