She found her calculator _______ she lost it.

A．where        B．when         C．in which        D．that

A．What is earthquake?

B．The damage of earthquakes

C．How do earthquakes cause damage?

D．Where do earthquakes happen?

E．The prediction of earthquakes

F．Some misunderstanding about earthquake

61.______________

Earthquake is a kind of terrible natural disaster.An earthquake happens when rocks break and slip along a fault (断层) in the earth.Energy is given out of during an earthquake in several forms，including as movement along the fault，as heat，and as seismic waves that spread out from the  “source” in all directions and cause the ground to shake，sometimes hundreds of kilometers away.

62. ______________

Most earthquake damage is caused by ground shaking.In general，large earthquakes produce ground motions with large amplitudes (振幅)．Large earthquakes also produce strong shaking over much larger areas than do smaller earthquakes.The strongest earthquakes that happen can result in ground crack，causing damage to bridges，dams，roads，railroad tracks，and the foundations of buildings.Another major cause of damage is the fires that burn the buildings when power lines fall and gas lines crack.In addition，undersea earthquakes can cause great damage to seashore.

63. ______________

A common misunderstanding is that of a hole in the ground that opens during an earthquake.This has nothing to  do  with  reality  but is  Hollywood’s  films  of earthquakes.After a strong earthquake，some cracks may be seen on the ground.These are not faults，nor are the cracks ready to close up again.Theses cracks are probably due to soil settlement  (沉降)  caused by the ground shaking.

64. ______________

Earthquakes happen all over the world.However,90% of the world’s earthquakes happen along these plate boundaries  (边界)．The  “Ring of Fire”  circling the Pacific Ocean，and including Canada’s west coast，is one of the most active areas in the world.

65. ______________

With the present state of scientific knowledge，it is not possible to predict (预测) earthquakes and certainly not possible to predict their exact time and location.They are greatly different from one place to another，according to many factors which are poorly understood.However，a great deal of research is being done to develop correct prediction methods.

--- In which part of the play was          your brother appeared?

--- In the last ten minutes.

A．that where                  B．this when            C．it that                  D．it where

She found her calculator _____ she lost it．

A．where       B．when        C．in which         D．that

In which play is ______your brother appears?

A．that where                  B．this when             C．it that                   D．it where