A、To rotate to minus 45°. B、To stretch the body first. C、To experience climbing. D、To demonstrate techniques. B讲座中提到，该攀岩中心有一个小的热

Welcome to the Edge Climbing Centre. I’m Jason White, manager assistant. I would like to give you an introduction about the climbing centre. The Edge Climbing Centre was opened in 1994, and constructed and doubled its original size in 1998. The Edge is a founder member of the Association of British Climbing Walls. Let’s begin with our facilities. The first one I’d like to introduce to you is the main hall. With over 150 routes the main hall packs in a huge variety of climbs on featured and flat panels. Our facilities are continuously developing and feature a 13-meter articulated wall that can rotate to minus 45°. We think we have every angle covered! There are angles to suit everyone from the beginner to the most experienced climber. Besides, we have a small warm-up wall. You can climb at an easy standard to get those bones moving. It is equipped with top-ropes that are ideal for demonstrating techniques to novices. Our café is a relaxing place to have a rest between climbs, with plenty of choices. We sell tea, coffee and soft drinks, as well as a range of mouth-watering cakes. The Edge has two changing areas located on the upper floor. There are also toilets, washing facilities and lockers. Locker keys are available from reception.
    At the Edge you can pay per visit or save on course fees by becoming our member. We have three types of memberships. Gold membership is ideal for regular visitors. Our gold membership packages are available for 6- or 12-month periods. You should pay ￡18 for half a year and ￡30 for one year. You do not need to pay any course fees. The fee of our 12 months’ silver membership package is ￡20. Climbers have to pay ￡ 1 for each course. Both gold membership and silver membership are offered to climbers over the age of 18. Meanwhile, younger climbers aged from 14 to 17 should try the bronze membership which is more suitable. It has the same period and price as the silver membership.
    Thanks for attending the introduction lecture of the Edge Climbing Centre. I hope you will enjoy our facilities in the future.
    Questions 23 to 25 are based on the recording you have just heard.
    23.Why do people climb the warm-up wall?
    24.Where can people get the keys to lockers?
    25.What do we know about the bronze membership?