Earthquakes are common, and thousands of them happen each day.  But most are too weak to feel. During a   earthquake, there is often a great noise first.  Then the earth   terribly and many houses    down.  Railway tracks break and trains go off lines. A great many factories are destroyed. Thousands of deaths are caused, and many more lose homes.  Besides the great damage and deaths caused by the earthquake   ,other accidents such as fires often     . More buildings are destroyed and more deaths caused. It is well-known of the   of an earthquake, and for centuries man has been making researches on earthquakes. More than 2,000 years ago,  ,a Chinese scientist named Zhang Heng invented a machine which could     from which direction the seismic waves（地动波）had come, and this machine is still    by scientists today. Now we know much more about earthquakes and   they happen, but we still can't tell exactly when and where earthquake will happen,  and cannot stop it from happening.

1.A. real            B. weak              C. big               D. small

2.A. moves              B. shakes        C. jumps         D. breaks

3.A. get                    B. put              C. set    D. fall

4.A. lonely    B. later           C. themselves   D. itself

5.A. follow    B. copy           C. come          D. enter

6.A. information       B. questions     C. dangers       D. troubles

7.A. as a result         B. in fact         C. for example  D. as well

8.A. find out           B. think up        C. point at        D. look for

9.A. improved B. repaired      C. protected     D. used

10.A. where           B. why              C. what           D. when

Scientists tell us so much about the moon, it is quite easy to tell what it is like. It’s certainly not a friendly place. As there is no air or water, there can be no life of any kind. Mile after mile there are only plains(平原) of dust with mountains around them above, the sun and the stars shine in the sky. If you step out of the mountains’ shadows(影子) it will mean moving from terrible cold into great heat. The moon is also a very silent world, for sound waves can only travel through air. But from the moon, you can see a friendly sight. Our earth is shining more brightly than the other stars. It looks like a very large ball, coloured blue and green and brown.

1. What kind of place is the Moon?

A. It is an unfriendly place.

B. It is a lively place.

C. It is a nice place.

D. It is a place with many plants.

2.Temperature on the Moon_______.

A. is usually the same

B. is always very low

C. can be very different

D. is usually very high

3.The Moon is a silent world because_______.

A. there is no life there

B. there is no air there

C. there is no green tree there

D. there is no water there

4.The underlined words “step out of” means _______.

A. 登上 B. 走出 C. 上来 D. 步入

5.When we look from the moon, the blue colour on the earth is_______.

A. water B. trees C. mountains D. clouds