Question

the book， （）are truth stories about great scientists of 20th，is worth reading

in which of which 怎样判断呢，具体讲一下谢谢

Answer 1

关于 ：介词+关系代词 引导的定语从句，考点往往是介词的选择。
突破方法建议如下：
把定语从句用简单句表达，如上句：True stories about great scientists of 20th are in the book
逻辑通顺，符合语法，故答案是：in which
再如： The book , of which the price is too high isn't well received .
转换如下： the price of the book is too high
符合逻辑，语法通顺

追问

转化过来都困难，怎么办呢

Answer 2

可以代回去看，truth stories in the book 是关于20多岁伟大的科学家的，显然是truth stories of the book是说不通的，所以选择in which