问题
选择题
The factory produces half a million pairs of shoes every day, 85% ____ sold abroad.
A．of them are
B．of them is
C．of which is
D．of which are
答案
答案：D
题目分析：句意：这个工厂每天生产50万双鞋，85%的鞋被销往国外。这个句子包含一个非限制性定语从句，且“85%的鞋”和“销往”之间是被动关系，故用被动语态，选D。