Question

The journey around the world took the old sailor nine months, _______ the sailing time was 226days.

1.The journey around the world took the old sailor nine months, _______ the sailing time was 226days.
A. of which B. during which
C. from which D. for which
我问一下：把后面的 of which the sailing time was 226days.改成一个句子就是 the sailing time of the nine months was 226 days.
根据 of the nine months 应该是of the which 为什么答案就是of which呢？不是有the的嘛！ 不知你是否理解我的意思／愿听解释。 解释好的给高分！

Answer 1

不是of the nine months，而是of the journey
which是代词，作为先行词代替前面的the journey

至于为什么不用加the
如下：
句子：this cat is the cat which i like the best。which做the cat 的先行词

Answer 2

of which ,这里which就是代替的是 the nine months啊，这个没问题啊。我猜你是把 whose 有时可以替换 of which the 和这个混淆了。那个the 在sailing time前面啊！先行词前加不加the 的都用which替换可以的啊