帮我看一看这篇英语作文有什么语法错误

Laughing sir is a fairly good undercover. he has worked for 10 years.
In 2011. When he finished the undercover work in dongguan, he backed to hongkong and became an instructor in CIB. He started to select and trani new undercovers. Although laughing sir is arrogant and pompous. all of the students look up to him. The reason why laughing sir is popular is that he is a responsible and handsome man.
when he worked in CIB. he falled in love with his handle,madam Jo. she liked to say"this is an order". but in the end,she was dead. laughing sir was inconsolable and so am I.
In a word. I love Madam Jo and laughing sir! I love Lives of Omission