I'll never forget the day that I spent in the country.(that作宾语)

　　They worked in a factory that makes radio parts.(that作主语)

　　The reason that he gave me why he didn't attend the meeting is that he was badly ill.(that作宾语)

　　3.where引导定语从句与引导地点状语从句的区别在于其前面有没有先行词。前面有先行词则是定语从句，无先行词则是状语从句。例如：

　　We will be shown around the city: schools ,museums ,and some other places ,where other visitors seldom go.(where引导定语从句)

　　The famous scientist grew up where he was born and in 1930 he came to Shanghai. (where引导状语从句)