If the sun has enough power to warm and light the whole earth, it must have enough power to do other things, too. Can we use the sun's abundant energy to supply electricity, or at least to perform the functions which electricity or other types of power usually perform? The answer is yes.

For example, people have for many years been using the reflected heat of the sun to cook.

   Solar cookers have been built with several curved(弯曲) mirrors reflecting the sun and focusing its heat on the cooking component. This equipment can be used just like a gas or electric stove; it is more expensive to make but it does not need any fuel, and so costs nothing to use. Another possibility of using solar energy is in househeating.

The form of energy we use most is electricity, and every day more is needed. But electricity has to be made, too, and to make it                        are required--oil, gas and nowadays even uranium(铀).

The question which worries everyone today is：how long will these fuels last? Nobody knows it for sure, but most experts think it will soon be difficult to obtain sufficient electricity from these sources. It is possible that the sun can make a contribution here, too.        

Solar power has already been used to produce terrific heat. In Southern France a solar furnace(huge stove) has been built, where temperatures reach more than 3,000℃. This furnace is only used for experiments at present, but could be used to produce steam for a power station.

1. What is the main idea of the passage? (Please answer within 10 words. )

2. Which sentence in the passage can be replaced by the following one?

    The sun can also make it possible for us to get a large quantity of electricity instead of from other fuels.

3. Please fill in the blank in the third paragraph with proper words or phrases to complete the sentence. (Please answer within 10 words.)

4. Which can last longer, the ordinary fuels or the solar energy? What shall we do to have enough electricity? (Please answer within 30 words.)                                                                                5. Translate the underlined sentence in the second paragraph into Chinese.

America is a country on the move．In unheard-of numbers, people of all ages are exercising their way to better health．According to the latest figures，59 percent of American adults exercise regularly―up 12 percent from just two years ago and more than double the figure of 25 years ago．Even non-exercisers believe they would be more attractive and confident if they were more active．

It is hard not to get the message．The virtues of physical fitness are shown on magazine covers，postage stamps，and television ads for everything from beauty soaps to travel books．Exercise as a part of daily life did not catch on until the late 1960s when research by military doctors began to show the health benefits of doing regular physical exercises．Growing publicity for races held in American cities helped fuel a strong interest in the ancient sport of running. Although Americans have also discovered other forms of exercise（such as walking and swimming，running__________________________．

      As the popularity of exercise continues to increase, so does scientific evidence of its health benefits. The key to fitness is exercising the major muscle group vigorously enough to approximately double the heart rate and keep it doubled for 20 to 30 minutes at a time．Doing such physical exercises three times or more a week will produce considerable improvements in physical health in about three months．

1. What is the best title for the passage?（Please answer within 10 words.）

____________________________________________________________________________

2. Which sentence in the passage can be replaced by the following one?

There are a lot of people of all ages who seek for better health through exercise．

___________________________________________________________________________

3. Please fill in the blank in the second paragraph with proper words or phrases to complete the sentence．（Please answer within 10 words.）

________________________________________________________________________

4. What is the author’s purpose in writing the last paragraph?（Answer within 30 words．）

_________________________________________________________________________________

5. Translate the underlined sentence in the last paragraph into Chinese．

_________________________________________________________________________________

       America is a country on the move．In unheard-of numbers, people of all ages are exercising their way to better health．According to the latest figures, 59 percent of American adults exercise regularly——up 12 percent from just two years ago and more than double the figure of 25 years ago．Even non-exercisers believe they would be more attractive and confident if they were more active．

       It is hard not to get the message．The virtues of physical fitness are shown on magazine covers, postage stamps, and television ads for everything from beauty soaps to travel books．Exercise as a part of daily life did not catch on until the late 1960s when research by military doctors began to show the health benefits of doing regular physical exercises．Growing publicity for races held in American cities helped fuel a strong interest in the ancient sport of running Although Americans have also discovered other forms of exercise(such as walking and swimming), running                                             ．

       As the popularity of exercise continues to increase, so does scientific evidence of its health benefits．The key to fitness is exercising the major muscle group vigorously enough to approximately double the heart rate and keep it double for 20 to 30 minutes at a time．Doing such physical exercises three times or more a week will produce considerable improvements in physical health in about three moths．

1．What is the best title for the passage? (Please answer within 10words．)

2．Which sentence in the passage can be replaced by the following one?

There are a lot of people of all ages who seek for better health through exercise．

3．Please fill in the blank in the second paragraph with proper words or phrases to complete the sentence．(Please answer within 10 words．)

4．What is the author’s purpose in writing the last paragraph? (Please answer within 20 words．)

5．Translate the underlined sentence in the last paragraph into Chinese．

       Men have traveled ever since they first appeared on the earth.

       Long ago, they did not travel for pleasure but to find new places where their cattle could feed, or to        from their enemies, or to find more favorable climates.

       They traveled on foot. Their journeys were long, tiring, and often dangerous. They protected themselves with simple weapons（武器）, such as wooden sticks or stone clubs, and by lighting fires at night and, adove all, keeping together.

       Very soon they discovered easier ways of traveling. They rode on the backs of their tame animals; they made boats out of tree trunks so as to travel across water.

       Later they traveled, not for necessity, but for the joy and excitement of seeing and experiencing new things. This is still the main reason why we travel today.

       Traveling, of course, has now become a highly-organized（有组织的）business. There are cars and splendid roads, express trains, huge ships and jet planes, all of which make traveling comfortable and safe.

1．What’s the title of the passage?（Pleases answer within 5 words.）

2．Please fill in the blank in the second paragraph with proper words or phrases to complete the sentence.（Please answer within 5 words.）

3．Which sentence in the passage can be replaced by the following one?

       men made tree trunks into boats so that they could sail on rivers.

4．Translate the underlined sentence in Paragraph 5 into Chinese.

5．How do men feel about traveling？（Please answer within 10 words.）