This is the most beautiful house_I have ever visited.

问题描述:

This is the most beautiful house_I have ever visited.
空格填什么单词

填that,是因为定语从句中先行词前面有形容词*the most 修饰,只能用that; 或者不填,由于定语从句修饰的house作宾语,可以不填.而且不填的情况在口语里更多见.