阅读下列短文，从每小题所给的A、B、C、D四个选项中，选出最佳选项Every thirty seconds there is an earthquake in the world. Some of these earthquakes are so weak that people can't feel them. But some of them are very serious and many people get hurt or die in them. Do you know what causes earthquakes?
The earth's surface(表面)has many pieces. These pieces are always moving. When two pieces move past each other, there is an earthquake. Scientists are trying to predict(预测)big earthquakes, but it's very hard. Do you know how to protect yourself during an earthquake?Here are some ways You should remember them.
If you are inside
◆ Quickly move under a desk or along a wall. It will protect you from falling things. Don't run out of the door
◆ Keep away from windows.
◆ Turn off lights.
◆ Don't get into a lift. If you are in a lift, get out as quickly as possible. If you are outside
◆ Don't stay near tall buildings and trees. Things may fall on you.
◆ Be careful of fallen power lines.
◆ Lie on the ground in clear areas until the shaking stops.
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