学习目标：
1. 语言目标：Learn the use of the following words and phrases.
right away well(n) burst as if at an end ruin in ruins injure destroy shock rescue trap dig out bury a (great) number of useless
2. 能力目标：Talk about earthquake and other disasters in English.
Try to finish the following according to your experiences;
1. Have you ever experienced any natural disasters? Give the names of the natural disasters you know.
