英语完型填空中this that怎么区分
问题描述：
英语完型填空中this that怎么区分
Many years ago,an Englishman was traveling to Italy.On his way he stopped in a small town in Switzerland called Geneva.（ ）Englishman took an carriage on top of which there was a carriage watch.This was the earliest kind of watch.其中括号里面为什么填that而不填this
答
That有指代前面提到的词的用法,this没有.完形里看到that就不选this,一个小窍门,