单句改错（共5小题，每小题1分，满分5分）
小题1:I stayed in Beijing for one and a half year.                 
小题2:The manager asked his men not waste any more time.           
小题3:Geography plays a part of making dialects.                  
小题4:He treated the boy even if he were his son.                    
小题5:It was the first time that I have seen Mr Black.