Here are the correct answers for each question based on the provided text:

1. **What does this notice tell visitors they can do?**
- **Answer:** B - ask a stadium worker when they want to know something.

2. **You have to pay to use the internet in the cafe after ten o’clock.**
- **Answer:** B - You get special offers on the cafe food when you visit the palace.

3. **What will happen each week?**
- **Answer:** A - An artist will go around the gallery with visitors.

4. **In cloudy weather is it free to go up the skyscraper?**
- **Answer:** A - In cloudy weather it is free to go up the skyscraper.

5. **Why is Jackie writing to Tim?**
- **Answer:** A - She can’t contact one of their friends.

6. **A pay for tickets online before collecting them at the museum.**
- **Answer:** C - Ask at the reception desk when you can buy tickets online.

Please let me know if you need any further assistance!