(76) Earthquake is a shaking of the ground caused by the sudden breaking and the shifting of large sections of the earth's rocky outer shell.Earthquakes are among the most powerful events on earth, and their results can be terrifying.A severe earthquake may release energy 10,000 times as great as that of the first atomic bom　　B.Rock movements during an earthquake can make rivers change their courses.Earthquakes can trigger landslides that cause great damage and loss of life.Large earthquakes beneath the ocean can create a series of huge, destructive waves called tsunamis that flood coasts for many miles.

Earthquakes almost never kill people directly.Instead, many deaths and injuries in earthquakes result from falling objects and the collapse of buildings, bridges, and other structures.Fire resulting from broken gas or power lines is another major danger during a quake.Spills of hazardous chemicals are also a concern during an earthquake.

(77) The force of an earthquake depends on how much rock breaks and how far it shifts.Powerful earthquakes can shake firm ground violently for great distances.During minor earthquakes, the vibration may be no greater than the vibration caused by a passing truck.On average, a powerful earthquake occurs less than once every two years.At least 40 moderate earthquakes cause damage somewhere in the world each year.About 40,000 to 50,000small earthquakes--large enough to be felt but not damaging-occur annually.

第11题　　The passage is mainly about__________

A.earthquakes and their effects　　B.the way of earthquakes taking place

C.the classification of earthquakes　　D.the damaging results of earthquakes

答案：A

第12题　　When an earthquake occurs, __________

A.people are killed and injured

B.rocks are breaking and shifting

C.destructive waves flood the coasts for miles

D.large sections of the earth's rocky outer shell suddenly break and shift

答案：D

第13题　　The earthquakes which may not be so destructive are __________

A.those beneath the ocean　　B.those do not kill people directly

C.moderate earthquakes　　D.minor earthquakes

答案：D

第14题　　The intensity of an earthquake depends on __________

A.the movements of the earth's shell　　B.where it takes place

C.the injuries it causes　　D.how far away it is from a city

答案：A

第15题　　It is implied that __________

A.powerful earthquakes usually occur after minor ones

B.modem facilities add to the danger of an earthquake

C.passing trucks are as dangerous as minor earthquakes

D.there is a powerful earthquake occurring every two years

答案：B

Vocabulary and Structure Vocabulary and Structure

第16题　　There is__________that well-educated citizens should devote their knowledge and skills totheir own country and people.

A.no deny　　B.no denying　　C.not deny　　D.not denied

答案：B

第17题　　We met the old man__________ times on the way home.

A.dozen of　　B.dozen　　C.dozens　　D.dozens of

答案：D

第18题　　We __________ as well leave here today.

A.must　　B.might　　C.need　　D.can

答案：B

第19题　　I'm not __________ to lift the heavy box.

A.short enough　　B.enough tall　　C.health enough　　D.strong enough

答案：D

第20题　　He will be sad when he__________ the bad news.

A.hear　　B.is hearing　　C.will hear　　D.hears

答案：D

第21题　　Do __________you think is right __________ difficulties you may have.

A.what……however　　B.that……what　　C.whatever……whoever　　D.what……whatever

答案：D

第22题　　He never let me __________when I need his support.

A.in　　B.down　　C.off　　D.out

答案：B

第23题　　The story you have just told __________me of an experience I once had.

A.informs　　B.convinces　　C.reminds　　D.warps

答案：C

第24题　　We had to __________a lot of noise when the children were at home.

A.go in for　　B.hold on to　　C.put up with　　D.keep pace with

答案：C

第25题　　It was because the applicant was too conceited (自负的) __________he failed in the　interview.

A.that　　B.so that　　C.so　　D.therefore

答案：A

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