听力原文：Is the increasing cost of quality golf lessons getting beyond what you can afford?Well, here at Mac's Golfing School we believe that everybody should be able to play, not only the rich. During the month of May, we are offering an introductory special. If you sign up for our two-month intensive course, you will receive 20 percent off the usual price and you will also get a set of beginners golf clubs. We have only university-trained instructors, all with professional experience. Our course includes 16 rounds of golf on an 18-hole course and unlimited use of our driving range. To sign up, go to www. macsgolf. com and follow the prompts. What is being advertised?