“Good manners cost nothing. Bad manners can cost you your reputation”
|Click on the above image to follow the link|
Being polite means being aware of and respecting the feelings of other people. It is usually difficult to be polite in a language different from your own, and that is because when you speak a foreign language you are stepping in another culture, with a different way to behave in society. If you do not want to be rude in English, and (I am sure you don't)just follow the above link and learn how to be polite.
or watch the video:
Engvid has posted a test about the video if you want to try.