The Lake on Top of a Mountain
Imagine a lake as blue as the summer sky, surrounded by thousands of pine trees and towering mountains.
People come during every season to enjoy Lake Tahoe. It is the perfect spot for camping, boating, fishing, biking, and hiking.
While people now use Lake Tahoe mostly for fun rather than survival, it is still important to keep the water and land clean. California and Nevada work together to make sure these natural resources are used wisely.
| A．Few people know this place |
| B．It sounds like something from a storybook |
| C．They even created many tales about the lake |
| D．Thousands of people visit Lake Tahoe each year |
| E．However, Lake Tahoe is best known for its snow sports |
| F．They have excellent hunting skills and never farm the land |
| G．It would be terrible if the lake and mountains became severely polluted |
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【推荐1】The most attractive national parks on earth provide the most quickest way to discover how amazing the planet is. Visits to the greatest national parks in the world make you experience breathtaking natural wonders.
Arenal Volcano National Park
Anyone who has been to Arenal will probably tell you that “It's paradise”. Arenal Volcano National Park is located in the middle of Costa Rica, Central America. The park has a continuous active volcano. In fact, you can see lava pouring down its sides. Hot springs surround this volcano. Numerous hidden waterfalls and animals-filled forests also surround the volcano.
Yellowstone National Park
America's Yellowstone is a land of great things. First of all, this is the world's first natural park. It is also the continent's largest volcanic zone. Yellowstone provides home to the largest group of bison (野牛) in the world. It seems like Yellowstone shows the crème de la crème (精英) of the American west.
Jiuzhaigou Valley National Park
You are going to China, and in addition to the Great Wall, you probably need to visit a great national park. You shouldn't worry since you are pretty well covered. The Jiuzhaigou Valley National Park is more than magical. It stands among five impressive colored lakes. You will enjoy watching the fresh and clear blue sky above; while the park*s evergreen forests are full of life and energy.
Kilimanjaro National Park
You are in Tanzania again, and you probably might have known Mt. Kilimanjaro. Most of all, it is Africa's highest mountain. All enthusiastic mountaineers dream to climb to the top of it. As a result, the Kilimanjaro National Park is most popular with them. Since great grasslands and wildlife surround the mountain, your trip to Mt. Kilimanjaro becomes more fascinating and inspiring.
1. What do Arenal Volcano National Park and Yellowstone National Park have in common?| A．Their evergreen forests are lively. |
| B．They are full of great grasslands. |
| C．They have splendid volcanoes. |
| D．They are home to African wildlife. |
| A．Arenal Volcano National Park. | B．Yellowstone National Park. |
| C．Jiuzhaigou Valley National Park. | D．Kilimanjaro National Park. |
| A．Costa Rica. | B．China. |
| C．America. | D．Tanzania. |
【推荐2】Scientists have long shown great interest in Vostok. Blocked from the outside world for centuries, Vostok is buried under 13,000 feet of ice. The huge underground lake is the size of Lake Ontario and is located in one of Antarctica's coldest areas. Scientists want to know: What lives below the ice?
They might find out soon. After more than 10 years, a team of Russian scientists have finally been able to drill through the ice into Vostok's ancient waters, Vostok lies below one of the coldest zones on Earth, and drilling can take place each year only during Antarctica's warmest weather. This is when the ice is easier to drill, and the temperatures are not as severe for scientists living in the Vostok Research Station, which is above the lake. All the past drillings failed because the scientists did not finish the job before the weather became too cold.
Scientists believed that Vostok has been closed off from the outside world for about 30 million years. Signs of microbes were discovered years ago in the ice above the lake. Some researchers think similar life-forms could be thriving in Vostok's waters.
Ancient forms of life that could remain in these waters might present new information about how living things can survive in extreme environments, and about how life used to exist on Earth millions of years ago. "For me, the discovery of this lake is like the first flight into space," says scientist Valery Lukin. "By technological complexity, by importance, by uniqueness."
More than 350 underground lakes are frozen below Antarctic, and Lake Vostok is one of the largest. Teams of scientists are now planning to drill into similar lakes throughout Antarctica. In December, an American team will be tunneling into Lake Whillans near the South Pole, and a British team will attempt to reach Lake Ellsworth in West Antarctica.
1. Russian scientists drilled through the ice into Lake Vostok to .| A．get some ancient water | B．find possible forms of life |
| C．explore natural resources | D．measure the thickness of ice |
| A．What was in the Antarctica lakes has been discovered. |
| B．Signs of microbes are found on the surfaces of many lakes. |
| C．Some living things may be able to survive in space. |
| D．Similar drillings are to be carried out by other scientists. |
| A．What Lives below the Ice? | B．What Gets Vostok Blocked? |
| C．The Best Season to Drill | D．Lakes under Antarctica |
【推荐3】It's been a year since the dramatic rescue of the 12 members of the junior football team and their Coach from the Tham Luang Nang Non cave in Chiang Rai Province, Thailand. The rescue put a spotlight on cave exploration and the adventures that people can have underground. Caves have an almost primal（原始的）appeal—they hold the secrets to our past and are mysterious in themselves. They are home to mini-ecosystems that could not exist above ground.
Mammoth Cave, Kentucky, USA
The longest cave system in the world lies beneath the Green River Valley in Kentucky, and while over 400 miles of passageways have been mapped, it has yet to be fully explored. The complex limestone labyrinth（石灰岩迷宫）was discovered by humans 4,000 years ago and is home to a rich habitat of many rare animals, including eyeless fish and cave salamanders（火蜥蜴）.
Avshalom Cave Nature Reserve, Beit Shemesh, Israel
Also known as the Soreq Cave Nature Reserve, Avshalom is considered to be the Rosetta Stone（罗塞塔石碑）of climate history in the Eastern Mediterranean due to thickly packed stalactites（钟乳石）found in the cave, some of which are over 13 feet long and are as old as 300,000 years.
Crystal and Fantasy Caves, Hamilton Parish, Bermuda
A truly magical experience below the earth, these caves were formed in the Pleistocene Era（更新世）, but only found by humans just over 100 years ago. Groups of crystals and stalactites hang above a crystal-clear pool that is a mix of fresh and salt water and is almost 60 feet deep.
1. Why is the football team's story mentioned in the text?| A．To praise the bravery of the rescue team. |
| B．To highlight the long history of some caves. |
| C．To introduce the topic of cave exploration. |
| D．To show how adventurous cave exploration is. |
| A．See groups of crystals. | B．Enjoy some stalactites. |
| C．Watch the Rosetta Stone. | D．Appreciate a limestone labyrinth. |
| A．There is only salt water in it. |
| B．They have existed since the Pleistocene Era. |
| C．They are located near the Eastern Mediterranean. |
| D．They are a habitat for eyeless fish and salamanders. |
