I have been working in various international investment bank in Hong Kong and we communicate in English to the colleagues all over the world in English, therefore the accent of English (British or American) and the common use of slang and dialogue are crucial to show that you are capable to speak like a foreigner in your circle, even though you are not studying international school right now. This will open up another part of your world.
I have many oral materials, which are for daily use, or for business use, and I would demand my student to have accurate accent via practicing and dictation. I can even teach you the western table manners.
Besides my private students, the good news is I trained my nieces oral English to have won every interview in school and jobs. And she got A in her oral English as a local school student.
