Greetings and Introductions

source: Oxford Online English   2013年11月4日
the full lesson:
Saying 'hello' is the simplest thing to do in any language, right? Actually, even here, there are many things to think about. Different forms of greeting are appropriate in different situations, and if you want to make the best impression you can, you need to make sure you use the right forms! Watch the lesson to find out more.