Is this the first factory the one some foreigners visited yesterday?为什么用THE ONE?

This is not the first Around this world ,the last is first. This is my first bag中first前要加the吗 this is ____lesson 1.we first 2.us first 3.the our first 4.our first this is the first lesson=this is________. this is the first time this was the first time 怎么用,有什么区别? This has been the first time与this is the first time有什么区别 This is the first man ___(walk)to the moon . lesson the is first this week of the . This is the first two sections of the book. This is the first lesson ( )the new term day,term,of,this,the,the,is,first,new This is My first This is the first time that I ______(be)there NO,This is the first time I chat with you This is the first time that I_the Summer Palace.(visit) the day this it is first term of造句 This is a b------- book than the first one.