Simone
要看族罩镇后面接的是什么 in which 是因为他后面的那一部分闷耐的in提到which之前了This is the city where/in which I met John.此处的which指the city，去掉in，the city 就变成了主语，跟之后的I产生主语冲突，去掉in后，大致是这个样子的1.This is the city which held the Olympic Games.当the city不再是兆粗主语时，是这样的2.This is the city in which the Olympic Games was held.它的原型是这样的，3.The Olympic Games was held in this city.
