A. 根据语境填写单词。
1. An is a sudden shaking of the ground, often causing damage to buildings.
2. A is a serious snowfall with strong winds which may cause power cuts and difficulty in daily travel.
3. A is a long period with little or no rain, making land dry and crops die.
4. A forms over warm ocean water, and often hits coastal areas hard which can destroy houses and blow down many big trees easily.
5. are large fires that quickly spread across forests or grasslands.
6. A is a large amount of water covering places that are normally dry, often caused by heavy rain or typhoons.
7. A is a huge and powerful sea wave, usually caused by an underwater earthquake or volcano, which covers the coastal areas suddenly.
8. A is a column of spinning(旋转) wind coming down from clouds to the ground, which can blow away cars and houses quickly.

1. earthquake 2. snowstorm
3. drought 4. typhoon 5. Wildfires
6. flood 7. tsunami 8. tornado