The key to exercise solutions in chapter 3e - Speaking skills for the textbook On Screen B1+ - Student's Book with authors Virginia Evans and Jenny Dooley from Express Publishing
Question
Read the dialogue and complete each gap with a suitable word.
Listen and check. Is the dialogue formal or informal? Give reasons.
The dialogue is formal (full verb forms (e.g. you are interested), advanced vocabulary (e.g. I am looking forward to hearing ...), longer sentences (e.g. Well, I am ... the summer)