题目内容：

单句改错（共5小题，每小题1分，满分5分）

1.I stayed in Beijing for one and a half year.                 

2.The manager asked his men not waste any more time.           

3.Geography plays a part of making dialects.                  

4.He treated the boy even if he were his son.                    

5.It was the first time that I have seen Mr Black.