Passage 3
Visiting a National Park can be relaxing, inspiring, but it can also be disturbing. As you drive into Rocky Mountain National Park, and you will see starving elk, damaged meadows and dying forests. Our parks are growing old because we have mistakenly protected them from natural processes, such as fire, predation, and insects. We believed that we were saving these remnants of wild America, but actually we have "protected" them to death. If we want to save our National Parks, the National Park Service must change its management priorities to prevent over population of animals and to restore natural process in the forest in order to prevent their stagnation and "death" by old age. We must act soon: our parks are dying of old age because we have altered the forces in nature that keep them young and strong.
By tracing the history of our National Parks, we can understand the problem and see why we need active management. In the early
A. Park managers interrupted the forest ecosystems through out the 20th century.
B. Flesh-eating animals should not be eliminated.
C. Insect suppression may cause the forests to over-mature.
D. Severe damage to native vegetation in the forest is caused by fir
Passage 3
Visiting a National Park can be relaxing, inspiring, but it can also be disturbing. As you drive into Rocky Mountain National Park, and you will see starving elk, damaged meadows and dying forests. Our parks are growing old because we have mistakenly protected them from natural processes, such as fire, predation, and insects. We believed that we were saving these remnants of wild America, but actually we have "protected" them to death. If we want to save our National Parks, the National Park Service must change its management priorities to prevent over population of animals and to restore natural process in the forest in order to prevent their stagnation and "death" by old age. We must act soon: our parks are dying of old age because we have altered the forces in nature that keep them young and strong.
By tracing the history of our National Parks, we can understand the problem and see why we need active management. In the early
A. the government introduced stricter wildlife laws
B. the National Park Service employed more wildlife management techniques
C. the natural processes were restored
D. we continued to improve our natural environment
Passage Three
You can use your Business Telecard International at any card phone in the UK. Here is some information about making international phone calls.
You can now phone almost any country in the world, although In some cases you can only call major cities. When you cannot make direct dialing calls, you can ask the international operator to help you. This is more expensive and takes more time, but it may be helpful if you want to speak to a particular person and no one else; in this case you should ask for a "person-to-person" call. Even more expensive is a re verse charge (对方付款) call when the person who receives the call pays.
If the international line is busy, you can reserve a call; explain the number you want and the operator will call you back when the line is free.
You can save money by calling outside office hours, e.g. early in the morning, late at night, and on Sundays.
Remember that the time may be different
A. Book a call.
B. Make a "person-to-person" call.
C. Call back outside office hours.
D. Keep on callin
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