2015-2016学年 外研版 必修4Module 3 Body language and non-verbal communication Integrating skills课件 (10)
2015-2016学年 外研版 必修4Module 3 Body language and non-verbal communication Integrating skills课件 (10)第5页

Look at these expressions. Which are formal, and which are informal?

Pleased to accept unable to accept Thanks a lot I’m very sorry

The key:

“ Thanks a lot” is informal; the other three are formal.