Based on the provided text about rock climbing, here are the answers to the questions:

**1. What is the writer trying to do in the text?**
**a. advertise the Activity Centre** - The text primarily describes a personal experience at the Activity Centre, but it does highlight the activities available, which could serve an advertising purpose.

**2. What can the reader learn from the text?**
**c. what sort of activities you can experience at the centre** - The text mentions rock climbing and caving, indicating the types of activities available at the centre.

**3. How do you think the writer might describe the weekend?**
**a. interesting** - The writer reflects on their experiences and excitement, suggesting it was an interesting weekend.

**4. What do we learn about the group?**
**a. Some of them had been there before.** - The text implies that some members of the group may have experience with outdoor activities, though it doesn't specify who.

**5. Which of the following advertisements describes the Activity Centre?**
**a. It allows you to make up your own timetable and choose from a variety of activities.** - The text reflects flexibility in activity choices and personal preferences during the visit.