选项有: in which, of which
想请问下列空格中应填入哪个？以及为何呢？ 谢谢大家
1. I love this book! I enjoyed reading about real-life experiences _______ a
relatively small event sparks something that is really exciting.
2.This book is entirely original, It takes a number of old stories, ______ I h
ad read several before, and presents them in a brand-new way.
（出自远东高中英文课本第四册）