This is the second school___I used to work at.Many students

This is the second school___I used to work at.Many students 求助几道英语题This is the second factory_____I used to work at,many 1.this is the factory ----------- i used to work many students are going to work harder at school this year 改 Many students are going to work harder at school this year.改 Is this factory ____your father used to work many years ago? this is the factory.his father used to work this is the city 英语 this is the company in which i used to work.为什么用in work o this the school___I studied three years ago It is the farm where I used to work when I was at middle sch the second-year students at this college have envoled into i The young man used to () to work,but he is used to () to wor