The key answer of exercise 4

a)

• Speaker 1 goes hiking. Doesn't see another person. Focuses on the walk and doesn't think about anything else.
• Speaker 2 plays the piano. Finds it relaxing 'goes with the flow'.
• Speaker 3 does team sports. Problems 'melt away'. Running around in the open air, getting sweaty, is a 'remnant of childhood' when you had nothing to worry about.

b)

1. Where does he go hiking? / Where are the hiking trails?
2. What did he see on a trail (about a year ago)?
3. What instrument does she play to unwind?
4. What do her friends say her music / stuff' sounds like?
5. What does he do to relax?
6. Who does he play with / meet up with?

c)

1. 'A hard slog' means a difficult, long task
2. 'Go with the flow' means proceed with no fixed plan. Liquids flow, eg, rivers.
3. 'A remnant of childhood' means a memory remaining from your childhood.