四级预测试卷三

四级考前冲刺试题三

Part I Writing (30 minut

1. 以前购买手机号很容易，不需要身份证

2. 这么做带来的问题

3. 实行手机号实名制的意义

ID Registration Policy for Mobile Phone Users

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Part II Reading Comprehension (Skimming and Scanning) (15 minutes Working to Improve the Conditions of Everglades National Park When many people think of Florida, images of sandy coastlines or theme park rides come to mind. But about an hour south of Miami lies a natural wilderness (野生地) different from anywhere else in the United States.

Everglades National Park is the largest subtropical wilderness in the country. The park is home to several rare and endangered species. It is also the third largest national park in the lower forty-eight states, after Death Valley and Yellowstone. More than one million people visit the Everglades each year. Wildlife Reserves

The Everglades is considered one of the great biological wonders of the world. The expansive wetlands stretch across more than 600,000 hectares (公顷). It is a place where plants and animals from the Caribbean Sea share an ecosystem (生态系统) with native North American species.

Unlike most other national parks, Everglades National Park was created to protect an ecosystem from damage. The Everglades is home to 36 species that are considered threatened or protected. They include the Florida panther, the American crocodile (鳄鱼) and the West Indian manatee. In addition, more than 350 bird species and 300 species of fresh and saltwater fish live within the park. The Everglades is also home to forty species of mammals (哺乳动物) and fifty reptile (爬行动物) species.

Exotic plants can also be found in the Everglades. They include what is said to be the largest growth of mangrove trees in the western half of the world. Gumbo-limbo trees, known for their peeling red skin, strangler figs and royal palms are also among the area’s plant life. The Everglades is also home to the country’s largest living mahogany tree. Saw grass grows i n some areas of the park. Be careful — it is very sharp, with teeth just like a saw. It can grow up to four meters tall.

With about 1.5 meters of rainfall each year, plants and trees never stop growing in the Everglades. Want to visit it?

The dry, winter season is the favorite of most visitors, when insects like mosquitoes are less of a problem. The rainy season lasts from June to November.

There are many ways to explore the Everglades. Visitors could see alligators (an American crocodile) while hiking the Anhinga Trail. The Everglades is the only place on Earth where freshwater crocodiles and saltwater crocodiles live in the same area. Visitors using canoes or airboats are likely to see large groups of wading birds (涉水鸟) like the wood stork or great blue heron. It is even possible to see flamingos (火烈鸟) in the Everglades.

Some might enjoy riding bicycles through Shark Valley, while others may want to move slowly through shallow waters where insects and wildlife can be seen up-close. Park guides also lead visitors on tours with tram cars.

This spring, Everglades National Park launched a visitation (探访) program to what was once a highly restricted military base. Park officials are working to recover a missile base used in the 1960s. The base played a part in the nuclear tensions between the United States and the Soviet Union.

The government built the Florida base shortly after the discovery of Soviet missiles about 300 kilometers away, on the island of Cuba. Tensions were high during the Cuban missile crisis. But missiles stored at the American base were never fired.

The base was closed and all missile equipment was removed in the 1970s. Today only the buildings remain.

This year, the historic area had many visitors, including former American service members who remember the missile crisis. The park hopes to offer more trips next spring, to help support the history for those who lived through it and for future generations.

Threats it faces

Experts say changes to the Everglades are threatening several different kinds of wildlife. They say the threats are a result of actions the United States government began more than fifty years ago, and settlers began even earlier.

The National Park Service says early colonial settlers and land developers thought the Everglades had little value. The settlers had plans to remove water from the area and in the 1880s developers began digging drainage canals. At the time, they did not understand the complexity of the Everglades’ ecosystem. As a result, they were not prepared for all the work and caused environmental problems. The ecosystem, however, was able to survive.

Even larger efforts to drain the wetlands continued between 1905 and 1910. Large areas were changed to farmland. This led to increased development, with more people moving to the Everglades and also more visitors.