2. They came to visit us on my birthday.

3. Did you have a good time in August?

4. Are you worried about Christmas?

5. The children are really excited for their summer vacation.

6. We were very disappointed in the organization of the festival.

7. John missed a lot of lessons. He was ill from January to March.

8. Helen had said goodbye to everybody in the class before she left for the hometown.

9. My cat is very fond of fish.

10. I waited until 10 o'clock and then went home.

11. We can see many stars in the sky at night.

12. My wife has been to Ho Chi Minh city several times.

13. He is very interested in football.

14. The river Rhine flows into the North sea.