Some parts of the earth are more likely to have earthquakes than other parts. This is usuallytrue of 1)__________areas because there the thickness of rocks is not even.It is easy to understand why people are so 2)__________by earthquakes. People used tobelieve that when an earthquake 3)__________, the ground opened, swallowed great numbers ofpeople, and then it closed. It was also thought that those people would 4)__________forever. But nowwe know this is not what really happens.What we need to fear most is the effects of a serious earthquake, including fires, floods, andlandslides. A powerful earthquake 5)__________in Yellowstone National Park on August 17, 1959.The earthquake was 6)__________and very strong. It also caused the worst landslides in US historysince 1927.After the earthquake, some people said that they would never visit Yellowstone, because theywere afraid they would be 7)__________in such a disaster caused by the earthquake. This is actually afoolish idea. Such a fear would 8)__________beautiful mountains for the rest of our lives.Even though earthquakes happen every day, such a powerful earthquake like the Yellowstone onedoes not happen frequently at all. We should feel 9)__________that very few of us will suffer such abad natural disaster. Besides, if we know 10)__________and make careful preparations, the lossof lives could be avoided .[音频]