1. Did Dan spend his summer holidays at the seaside with his friends? 2. Was the weather hot and sunny? 3. Did the children wear shorts and T-shirts? 4. Did they go to the sea every day? 5. Could Dan swim? 6. Did Jack teach Dan to swim? 7. Why did Dan feel happy? 8. When did they go to the sea? 9. What did the boys like to watch? 10. Where did seagulls fly? 11. How often did Dan send letters to his mother and father? 12. Who had a nice time at the seaside? 13. What did Dan do when he came back home?