5. а) a great opportunity; an unforgettable meeting ; to change plans; for a change
b) Here's your change - Thanks!
Chris and Yegor, change your seats, please!
You will have a great opportunity to go for a walk in the famous park.
Let's change plans for the evening. We may go to the cinema or go
rollerblading.
6. 1. Where does Melinda live? 2. How many students did take part in the exchange? 3. What are the going to arrange next week? 4. Why has Alice changed school? 5. What place are Jim and Jack playing chess in?