during which和of which的用法区别

题目

during which和of which的用法区别
`
如此题
15.The journey around the world took the old sailor nine months,_____ the sailing time was 226 days.
A.of which B.during which C.from which D.for which
为何用OF?

答案

定语从句,先行词是"journey",从句变成句子是 the sailing time of the journey was 226 days,which指代The journey 所以用of.用 during 的话就是the sailing time of the nine months was 226 days 这样就不是很通了...