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阅读理解
The sea is the largest unknown part of our world. It covers seventy－one per cent of the earth. There is still much to be discovered about working to explain its mysteries(神秘).
Some are studying ways of bringing the ocean's huge supply of water to the deserts of the world. Others hope to control the weather by learning more about the exchange of heat and moisture(潮湿) between the ocean and the air. Others are studying the ways in which sound travels and is affected by water and heat.
One of the most interesting projects in oceanography(海洋学) is the work of mapping the ocean floor. Only a very small part of it has been mapped. This was not important when only surface ships sailed the world's ocean, but it can mean the difference between life and death to men in submarines(潜水艇).
Long ago there was only one way to find out how deep the ocean was. A seaman could throw a weighted rope over the side of his ship. Then he pulled the rope up after it had reached the bottom. But this was not a very exact way of measuring.
In the 20th century a better way was found. Sound was used to measure the ocean. Seamen did an experiment. They dropped a number of devices that would burst with a loud noise when they hit the bottom. And a little instrument measured the time it took for the sound to reach the ship. This has helped the scientists to map the ocean floor.
Underwater photography is also important in mapping parts of the ocean floor.
Around the edges of the continents the ocean floor is flat and the water does not become much deeper for about 30 miles.
The area near the continents, where the water is not so deep, is the place where the ocean's greatest riches in marine(海洋的) life are found. Below these living creatures and plants are the largest unknown quantities of mineral.
At the end of the flat part the sea floor suddenly drops down forming deep hollows which are shaped like bowls. These huge hollows hold most of the world's water.
1．The sea covers ________.
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A．less than a quarter of the earth
B．one third of the earth
C．about half of the earth
D．almost three quarters of the earth
2．Scientists are studying the oceans. In the passage, which of the following is not mentioned?
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A．How to control the weather.
B．How sound travels and is affected by water and heat.
C．Why people depend on the sea so much.
D．How to irrigate the deserts of the world with the ocean's huge supply of water.
3．Measuring the depth of the ocean with a weighted rope is ________.
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A．exact
B．a new way
C．false
D．nearly correct but no exact
4．Another aid to the mapping of the ocean floor has been in the ________.
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5．The ocean's greatest riches are found ________.
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A．in deep hollows
B．in the flat part of the sea
C．close to the continents
D．around islands
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阅读下列短文，从每题所给的四个选项（A，B，C和D）中选出最佳选项。
Phone books have white, blue and yellow pages. The white pages list people with phones by last name. The blue pages contain numbers of city services, government services, and public schools. Business and professional (行业的) services are listed in a special directory—the Yellow Pages.
The area covered by one area code may be small or large. For example, New York City has one code area, but so does the whole state of Oregon. There is an area code of map of the US and Canada in the front of the white pages.
Pay have numbers in the US. This means you can call a friend at a phone booth (电话亭). Or if you are making a long distance call and run out of money, give the number on your phone to the person you're talking to, then hang up the receiver and they can call you back.
If you make a long distance call and get a wrong number, call the operator and explain what happens. This means that you can make the call again to the right number without having to pay more money; or you can have the phone company mail you a credit coupon that has the same value as the phone call.
Some companies advertise a service called WATS. You can dial a special number without a long distance charge. These are celled“toll-free numbers”and the area code for all of them is 800. WATS means Wide Areas Telephone Service.
1．In the yellow pages, you can find a list of ________.
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2．You can find an area code map ________.
[ ]
3．If you run out of money when making a long distance call, ________.
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A．you can tell your telephone number to the one on the phone and wait to be called back
B．you can tell the one on the phone your number and hold on, waiting to be called back
C．you must hang up and stop making any calls
D．you have to run out and borrow some money
4．A credit coupon ________.
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A．is used to buy a phone
B．has the same value as the phone call
C．has no value at all
D．has more value than the phone call
5．The underlined part“toll-free numbers”means ________.
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阅读下面短文，选择正确答案
Beijing－An earthquake measuring 5.8 on the Richter scale left 5,000 people homeless, killed at least one person and injured 39 others in southwest China, on Thursday, with more accidents expected.
By late Thursday, 4,900 people were declared homeless after the quake destroyed their homes in a mountainous area lying on the border between Yunnan and Sichuan provinces. The dawn quake left one dead and 39 injured, destroyed 268 houses and damaging 1,132 other buildings so seriously that they were considered uninhabitable.
Another 2,400 houses suffered less serious damage. The epicenter(震中) was near the scenic Lugu Lake, a tourist site, where the local school was severely damaged.
Preliminary(最初的) estimates put economic losses at 180 million yuan(22 million dollars).
Governments in Yanyuan and the neighboring Yunnan county of Ninglang have joined forces in the rescue efforts and tents, clothes and medicine are badly in need for the earthquake victims.
The mountainous terrain, heavy rain and several aftershocks all prevented rescue efforts on Thursday. The rain could cause more badly damaged homes to fall down.
More dead and injured are expected “as rescuers have yet to reach many faraway areas”. It is very hard for rescue workers because most houses are scattered around the mountains, which are inhabited by Yi and other ethnic minority groups(少数民族).
The quake hit the area at 5:10 am Beijing time (2,110 Wednesday GMT). Earthquakes regularly affect the two counties with two quakes measuring 5.0 and 6.2 on the Richter scale killing at least three people and injuring more than 1,500 in Ninglang in November 1998.
The area is about 100 kilometers from the historic Yunnan town of Lijiang, which was struck in 1996 by an earthquake that killed more than 250 people and injured 14,000.
1．The author's purpose in writing the passage is to ________.
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A．tell us the earthquake taking place in Yunnan has caused 5,000 homeless
B．warn the people in mountainous areas in Yunnan to take care earthquake
C．call on more help from the people all over the country
D．analyse why the earthquake took place in this area
2．The underlined word “scattered” in the seventh paragraph has a closest meaning to ________.
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3．“The two counties” here refers to ________.
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