Which ringtone have you got on your mobile? I've just downloaded Homer Simpson - it's number one in the ringtone chart at the moment. There's been a special chart for ringtones for a few years now. Over the last decade, the ringtone industry has grown from nothing into a massive international business. So, how did it all begin? Well, do you remember that really annoying Crazy Frog? It was the first ringtone to achieve massive popularity. Since its creation in 2005, more than 11 million people have bought it. But do you know who invented it? It was a 17-year-old student in Sweden who created the original sound, by imitating his friend's moped. Then a graphic designer drew the frog, and the ringtone company Jamster began to sell it. Finally, a German band made a record based on the ringtone, and it reached number one in the UK singles chart. So, what does it mean for real music when a mobile ringtone becomes the nation's favourite song? Since the invention of the Crazy Frog, people have realized that you don't need talented musicians to make a hit single. And the music industry has realized that ringtones are worth a lot of money. In fact, record companies have just announced that they make more money from the sale of ringtones than from CD singles. Now, what about my Homer Simpson ringtone? I've only had it for a few hours but I think I feel like a change. How about that Crazy Frog? I haven't heard it for ages ... выпишите глаголы из текста, которые в форме Present Perfect