The details depended on which newspaper you read.

问题描述:

The details depended on which newspaper you read.
为什么不The details depended on you read which newspaper

这里其实是两个句子,The details depended on… + which newspaper did you read?
可以改写成depend on the newspaper you read
这里是把整个疑问句做on 的宾语、疑问句做宾语要改为陈述语序,
就好像 I want to konw how old you are、I want to know if you will marry me