Disasters such as tornadoes, floods, landslides, volcanic eruptions, typhoons, hurricanes and earthquakes have come one after another, causing great     1    to many countries. Among them the earthquake has the worst effects. The 1976 Tangshan earthquake caused more than 240,000     2    . 90 percent of homes lay in ruins and people     3    a lot. Everywhere the     4    survivors saw destroyed bricks and useless metals as if the world were at an end. Rescue teams dug out the trapped,    5    the dead and built shelters.   With unified efforts and wisdom of all people, the city revived itself and began to     6    again. Earthquakes under the sea can also cause tsunamis. The tsunami that     7    Asia in 2004 crashed into coastlines and swept away many people. Foreign countries aided these areas by     8    food and supplies by helicopter.   (Tips for emergency: ※Keep calm※Tap on a pipe or whistle for help※Stay away from power lines※Survive on what you have on hand.)