根据你听到的内容，完成下列短文，每空格限填一词。 1. People in South America began to eat the first chocolate ______of years ago. 2. In those days, they did not eat chocolate but enjoyed a kind of chocolate drink made by cocoa bean (可可豆). 3. Little by little, people came to like the of chocolate. 4. John Cadbury wanted to people to drink chocolate instead of other drinks. 5. But at that time, only the people could buy chocolate because it was very expensive. 6. Later, as the production of the chocolate was increased, it became . 7. Nowadays the famous milk chocolate made in Cadbury's factory has been the most chocolate in Britain as well as all over the world.