分类：教育/科学-外语学习
问题：问一道英语题Thejourneyaroundtheworldto 
The journey around the world took the old sailor nine mounths,(a)the sailing time was 226 days.
a.of which
回答：其中之一是"one of"
其中一些是"some of"
旅行时间9个月中有226天用于航行,因此9个月中的226天用"of which"
which是指"9个月"