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（預(yù)測）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 window.
   ◆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.

根據(jù)材料內(nèi)容選擇最佳答案。
（1）How often does an earthquake happen in the world？

D

D

A．Once every thirty seconds
B．Once every thirty minutes.
C．Once every three hours.
D．Once every thirteen seconds.
（2）An earthquake happens because

C

C

.
A．the Earth's surface is too thin
B．the pieces of the Earth's surface are moving too fast
C．two pieces of the Earth's surface move past each other
D．there are too many pieces on the Earth's surface
（3）Where should you stay during an earthquake？

B

B

A．
B．
C．
D．
（4）In the passage，you can know

B

B

.
A．you don't be afraid when an earthquake happens
B．you'd better not stand near tall buildings
C．you should look for your family after the earthquake
D．you should rebuild your homes after the earthquake
（5）The passage tells us

D

D

.
A．how to predict an earthquake
B．how to save people after an earthquake
C．what to do before an earthquake
D．what to do during an earthquake