4. Complete the dialogues with the phrases below.

Here's the completed dialogue:
1 A: What are you up to later this week?
B: I've got exams on Thursday and Friday. **Wish me luck!**
2 A: I'm running a marathon next weekend.
B: **Seriously?** I didn't realise you were so fit!
3 A: Sailing isn't dangerous, is it?
B: **Don't be daft!** It's perfectly safe!