【题目】 China and India are leaders in improving global(全球的) tree cover, a new study based on NASA research showed.

They took a 31.8% part together of the total global new leaf area between 2000 and 2017. China played a major role, adding 25% to this increase, and India added 6.8%, followed by Canada and Russia. The study in the Nature Sustainability journal shows that more than 5.5 million square kilometers of green leaf area was added globally. Since 2000, there has been a five-percent increase in global green cover, it said.

“The greening over the last twenty years shows an increase in leaf area on plants and trees which is as large as the area of the entire Amazon rainforest," Chi Chen, a Boston University researcher and lead of the study told Nature Sustainability. Large plantation activities to protect forests in China contributed nearly 42% to the country's green cover, and agriculture added another 32%. In India, 82% of the increase in leaf area was because of agriculture.

“China and India take up one-third of the greening, but hold only nine percent of the planet's land area covered in green plants," Chi Chen told NASA Earth Observatory. “That is a surprising finding, considering the land degradation(退化) in countries with large populations.”

Boston University's research team first detected an increase in global green cover in the 1990s but were unsure about what contributed to the increase. Finally, with the help of NASA's Terra and Aqua satellites research, they managed to find out the increase in leaf cover from different areas and places.

1Which country increased the largest part of the new leaf area?

A.IndiaB.China

C.CanadaD.Russia

2For what purpose did the author mention the Amazon rainforest?

A.To show how great the achievement was.

B.To show the importance of rainforest.

C.To explain what difficulties we have now.

D.To explain the reason for increasing forests.

3According to paragraph four, the following statements are true EXCEPT_______.

A.China and India have large populations and land degradation problem

B.about 9% of the planet’s greening is in China and India

C.China and India are leading in the global green cover increase

D.the leaf cover area in China and India is still limited if viewed globally

【题目】Washington, D.C. Bicycle Tours

Cherry Blossom Bike Tour in Washington, D.C.

Duration:3 hours

This small group bike tour is a fantastic way to see the world-famous cherry trees with beautiful flowers of Washington, D.C. Your guide will provide a history lesson about the trees and the famous monuments where they blossom. Reserve your spot before availability - and the cherry blossoms - disappear!

Washington Capital Monuments Bicycle Tour

Duration:3 hours (4 miles)

Join a guided bike tour and view some of the most popular monuments in Washington,D.C. Explore the monuments and memorials on the National Mall as your guide shares unique facts and history at each stop. Guided tour includes bike,helmet, cookies and bottled water.

Capital City Bike Tour in Washington, D.C.

Duration:3 hours

Morning or Afternoon, this bike tour is the perfect tour for D.C. newcomers and locals looking to experience Washington, D.C. in a healthy way with minimum effort.Knowledgeable guides will entertain you with the most interesting stories about Presidents, Congress, memorials, and parks. Comfortable bikes and a smooth tour route (路线) make cycling between the sites fun and relaxing.

Washington Capital Sites at Night Bicycle Tour

Duration:3 hours (7 miles)

Join a small group bike tour for an evening of exploration in the heart of Washington, D.C. Get up close to the monuments and memorials as you bike the sites of Capitol Hill and the National Mall. Frequent stops are made for photo taking as your guide offers unique facts and history. Tour includes bike,helmet, and bottled water. All riders are equipped with reflective vests and safety lights.

1Which of the following does the bicycle tour at night provide?

A. City maps. B. Cameras.

C. Meals. D. Safety lights.

2Which tour do you need to book in advance?

A. Cherry Blossom Bike Tour in Washington, D.C.

B. Washington Capital Monuments Bicycle Tour.

C. Capital City Bike Tour in Washington,

D. Washington Capital Sites at Night Bicycle Tour.

3What will you do on the Capital City Bike Tour?

A. Meet famous people. B. Go to a national park.

C. Visit well-known museums. D. Enjoy interesting stories.

【题目】 If you know a bottle of water has been recycled from urine (尿液), will you drink it? Chinese astronauts have done so.

China National Space Administration(CNSA)says it uses a high-tech machine to recycle wastewater. The machine will recycle everything from sweat, the water for washing hands, shower water, water used for brushing teeth, and even urine, to make drinking water.

It saves CNSA millions of YMB each year. At present, each CNSA astronaut uses about 4.4 liters of water every day. It costs about 150 million a year to transport water up to space.

The urine recycling system is needed for astronaut stations because it won’t have to ship up as much water to the station by space shuttles or rockets. Besides, it’s important as the space station is about to expand from three people living on board to more.

The recycling system was brought up to the space station last August by space shuttles. The three-man crew stood holding their drinks and congratulated engineers in CNSA center that worked on the system.

“This is something that has been the stuff of science work,” astronaut Chen Dong said before taking a small mouthful. “The taste is well worth trying.”

Is the water clean? Scientists say the wastewater will go through a very complicated (复杂的) process. For example, different chemicals will be put in the wastewater; the water will be heated to 130C to get rid of bacteria. The recycled water is thousands of times better than the water from a city tap, scientists say.

1What can the water recycled from urine be used for?

A.Drinking.

B.Washing hands.

C.Brushing teeth.

D.Taking a bath.

2Why is a high-tech machine to recycle wastewater needed on space stations?

A.To get astronauts to keep healthy.

B.To help astronauts do experiments.

C.To provide astronauts a basic living condition.

D.To save the cost of transporting water up to space.

3Scientists get rid of bacteria in the wastewater by ________.

A.recycling

B.freezing

C.heating

D.collecting

4What does the text mainly talk about?

A.Water recycled from urine tastes good.

B.How to recycle the wastewater on space.

C.New technology is used in the Chinese space station.

D.CNSA uses a high-tech machine to recycle wastewater for astronaut stations.

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