Think of two harmless things you can become addicted to and two harmful ones.

What is the difference in pronunciation between the noun addict,  the verb addict and the adjective addictive?
Think of (1) an activity and (2) a substance that are addictive. 

Think of three situations where someone might feel a rush of adrenalin?
Talk about a real situation in your life in which you felt a rush of adrenalin.

When would you wear an anorak?

Talk about someone you know who is a nerd.

interested, fascinated, obsessed, absorbed
Which prepositions do these words collocate with?
Which have positive / negative connotations?

Would you go potholing if someone invited you? Why? / Why not?

Think of three places where you could get trapped.

Talk for one minute about something you couldn’t live without it. 

If you got a kick out of something, would you do it again?