The key to exercise solutions in chapter 8c - Grammar in use for the textbook On Screen B1+ - Student's Book with authors Virginia Evans and Jenny Dooley from Express Publishing
Question
Look at texts A-C. Which is: formal? informal? Give reasons.
Look at the words in bold in the texts. Which refer to: people? objects? places? time? Which show possession?
Answer
The first text is a note. The second text is a postcard and the third text is an email. The note and postcard are informal. They contain short verb forms (e.g. There's) and everyday language (e.g. I can't believe it). The email is formal. It contains full verb forms (e.g. I am writing), formal language (e.g. in order to) and a formal greeting and ending.