阅读下面材料，在空白处填入适当的内容(1个单词或括号内的单词的正确形式)。
Earthquakes are quite common. In fact, thousands of earthquakes happen each day. Most of them are ____ weak to feel, though. During a big earthquake, there is often a big noise first. Then the earth shakes ____(terrible) and many houses fall down.
As one of the most deadly natural ____（disaster) in the world, earthquakes often result in many people being injured or killed. In 2008, a severe earthquake hit China's Sichuan Province, which____(kill) more than 80,000 people there.
Besides, the great damage and deaths caused by the earthquake____(it), other accidents such as fires often follow.____ (much) buildings may be damaged and more deaths may be caused.
For centuries, man have been making studies of earthquakes. About 2,000 years ago, for example, a Chinese scientist named Zhang Heng invented a machine, which could find out from which direction the earthquake waves came. With the rapid ____(develop) of modern science and technology, we now know a lot more about earthquakes. However, scientists still have
difficulty ____ (predict) exactly when and where ____earthquake will happen, and can't stop it ____happening.
