A. Deciding the statements:

1. True - The Edinburgh Festival takes place every year.
2. False - You can't guarantee seeing your favorite star in Edinburgh.

B. Answering the questions:

1. The Edinburgh Festival is a cultural event that takes place annually in Edinburgh, Scotland, featuring various artistic performances including theatre, music, dance, and comedy.
2. On the streets, you can see artists performing various acts such as street theatre, music performances, and artistic displays.
3. Thousands of tourists come to the festival to experience the diverse range of cultural performances, immerse themselves in the vibrant atmosphere, and enjoy the unique offerings of the city during the festival period.
4. The affordability of tickets for performances during the festival varies depending on the show and venue. Some performances may offer inexpensive tickets, while others may be more costly.

D. Writing:

1. Our city might have a sky-train system in the near future.
2. If resorts by the sea are still expensive, not many people will go there for their holiday next year.
3. It's about 50 km from Vinh City to Ha Tinh City.
4. Although she is so young, she always gives an excellent performance.
5. I spend 30 minutes cycling to school every morning.