Nature hands us a whole series of rich and varied colors,     1    (literal) on our plates! Not only do we eat pigments (色素),     2     we use some of them as colouring agents. Red, yellow, pink and green are just some of the rainbow of colors in our food.

The color of food has quite     3     impact on our choice of what we eat. We instinctively prefer the colors red, orange and yellow over green and blue, which tend     4    (represent) bitterness. Man is naturally attracted towards sweet food and dislikes all things bitter, a tendency which is evident right from birth. However, such preferences     5    (influence) by our individual experiences and education, cultural criteria and tendencies. The color of a particular foodstuff can also influence our perception of tastes,     6    (flavor) or smells and we often associate certain colors with particular tastes: pink with sweet things, green with     7    (salt) food and the color orange with spicy food.

    8     do carrots, peppers and tomatoes all have in common? They all contain natural coloring agents. Discovery of various coloring techniques spread the centuries. New and creative methods to abstract pigments, mix them and then dye (染色), all add a little color     9     life, simply to please our senses. Nonetheless, colored food also brings micronutrients which are essential for good health. So don’t wait any     10    (long)! Brighten up your plate today!

A new study found that nearly half of bald eagles    1    (test) across the United States show signs of repeated lead (铅) exposure. Researchers examined the blood, bones, feathers and liver tissue (肝脏组织) of l,210 eagles between 2010 and 20l8.

Lead is a poisonous substance     2     affects the nervous system and interferes (妨碍) with the normal function of nerve cells. Even in low amounts, lead can reduce bald eagles’ ability     3     (fly), hunt and reproduce. In high amounts, lead causes     4    (breathe) difficulty and death.

Bald eagles are one of America’s most celebrated conservation success stories. The birds       5    (remove) from the U. S. Endangered Species List in 2007. But scientists say that high lead levels are still     6     concern. Lead exposure also reduces their ability to face future difficulties, such as climate change or infectious diseases.

“Lead is available to these birds more than we     7    ( previous) thought,” said VinceSlabe, a research wildlife biologist at the nonprofit group Conservation Science Global.

The blood samples from live eagles in the new study were taken from birds trapped andstudied     8    other reasons. The bone, feather and liver samples came from eagles killed by vehicles, power lines or other causes.

The researchers also found higher levels of lead exposure in fall     9    winter. During these months, eagles eat animal remains left by hunters. These remains often contain many    10    (piece) of lead ammunition (弹药).

With fossil records dating back to 400 million years ago, sharks have lived even     1     (long) than the dinosaurs and many other forms of life. There are more than 500 species of sharks     2     (discover) on earth.

These sharks,     3     are so important to the natural order of marine ecosystems, are faced with     4     (extinct). While they have been an important resource for coastal communities in the developing world for     5     (century), this unique balance is in danger of being lost forever.

As our oceans are     6     (serious) influenced by the greenhouse effect, to restore these water bodies is the key     7    protecting sharks. What’s more, sharks’ wide range of species adds difficulty to the conservation efforts of protecting these     8     (amaze) creatures. And the great demand for their fins     9     (increase) the urgency of the task over the past few years. Through the effective strategies, we are trying to restore the balance between humans     10     sharks.

A five-month-old bird has set a new record for long-distance migration(迁徙)after    1    (fly)13,560 kilometers without stopping over a period of 11 days. The previous one was set two years ago by another bird that     2    (cover) about 12,000 kilometers in 11 days.

    3    (million)of birds set for the sky for a long and quite hard journey to get away from the coming cold, feed, and have babies for    4    next few months. A lot of them travel through distances of over 10,000 kilometers. This year, an    5    (astonish) 13,560 kilometers was covered by a bird,    6    set a new Guinness record in the process. This happened last month when the young bird had its     7    (depart) from Alaska to New Zealand for the winter. The bird took off    8    October 13 from the Yukon-Kuskokwim Delta in Alaska, followed the usual route across the Pacific Ocean down to New Caledonia and through the Tas-man Sea, before making an unexpected 90-degree turn towards Tasmania rather than New Zealand.

Scientists had the ability     9    (know) the bird’s record flight with the help of a tiny tracker that only weighed 5 grams. An expert said the bird lost “half or more of its body weight” during the 11-day flight, but it made it arrive at the dry land    10    (safe).

China has planted millions of trees in its northwest over the past two decades as part of its     1     (amaze) fight against the expanding deserts.

The effort has paid off. Around 2000, deserts across the country were still increasing by 10,400m² a year. But in 2017, they were decreasing by more than 2,400m² a year. The     2     (achieve) was confirmed by a study from the Laboratory of Climate and Environmental Sciences in Paris.

“In 1999, the Chinese government began planting millions of trees in its Grain for Green Program. It     3     (carry) out to repair damaged farmland in northwestern China,     4     is roughly the size of France,” says Philippe Ciais, a researcher at the laboratory. “I was there a few months ago, and it is indeed surprising that once bare landscapes are now almost fully covered by plants.”

“The growth of forests is significant     5     necessary progress in the fight against desertification,” says Jianping Huang, a researcher at Lanzhou University. “But it’s still too early to determine whether it has solved the problem. Researchers have found that many of the plant species     6     (introduce) to the region use more water     7     native vegetation. It could lead to water shortages for humans.”

The national forestry department has recognized the error. In recent years, it has worked more closely with researchers and communities to find ways to plant less     8     (thirst) plants that have economic value.

“All     9     (program) need to take into account local conditions,” the forestry department said in March “    10     (we) efforts should go towards keeping vegetation sustainable, rather than simply planting more trees.”

Queensland is an Australian state     1     (cover) the continent’s northeast, with a coastline stretching nearly 7,000km. Its offshore Great Barrier Reef,the world’s largest coral reef system, hosts thousands of marine     2     (species).

Queensland is also home     3     some of the most magical islands and the largest expanse of coral in the world. It may well be the closest you ever get to paradise.You can    4     (free) while away the hours on a deserted beach full of palm trees, go for a sail around the coral reef, on throw     5     (your) into the various water sports. Spread like jewels in the Pacific Ocean, these Australian islands stretch from Lady Elliott in the south to Lizard in the north,    6     all are a delight to visit.

Hayman Island    7     (position) within the heart of Australia’s Great Barrier Reef     8     (be) probably one of the most luxurious resorts in the world with dreamy beaches, unique wildlife and mouth-watering cuisine. For something a little more particular, try Bedarra, privately owned and with only sixteen villas(别墅). For a touch of history,go to Lizard Island,     9     Captain Cook landed in 1770. This is also where divers go. To get away from it all, go to Heron Island, a port of peace and quiet. Fraser Island has the     10     (large) sandy beach in the world, Hook has a wonderful National Park... the list is endless

Two villages have been named the Best Tourism Villages 2022 by the World Tourism Organization, thanks to their achievements in balancing tourism with economic development while    1    (stick) to environmental protection.

According to the organization, 32 villages in 18 countries and regions including Austria, Chile and China    2    (award) the recognition late on Tuesday. China’s Dazhai village in the Guangxi Zhuang autonomous region    3    Jingzhu village in Chongqing won the recognition.

Figures cited from the county’s culture and tourism bureau show that tourism development in Dazhai    4    (bring) great economic benefits to villagers and created more jobs for them since the village started to develop tourism around 2003.

    5    the bureau has pointed out, though the village only received 32,000 visits in 2004, the number rose    6    (sharp) to nearly 798,000 in 2019 before COVID-19 emerged. The villagers’ average income among its 1,212 people of 271 households, also saw    7    rise from 700 yuan per year ($100) to over 34, 500 yuan in 2019, the bureau said.

Jingzhu village, the other village    8    (recognize) by the World Tourism Organization this year is located in Wulong district of southwest Chongqing and over half of the villagers work in the tourism industry.

The World Tourism Organization began to award Best Tourism Villages across the world in 2021    9    (promote) the cultural heritage protection and sustainable development of villages. China so far has four villages winning the title,    10    the other two being Yucun village in Zhejiang and Xidi village in Anhui.

Bird-watching, a hobby    1     (favor) by many westerners, has been included in a public benefit program “Park Classes” in Wuhan schools. In the past six years, the program has carried out over 3,000 activities in Wuhan’s thirty urban parks,    2    (cover) all of the city’s primary schools and welcomed by over one million students. Buried in books and having little access to the outside world, many students don’t have the     3    (little) idea of what nature really is. This program is designed to enhance the awareness of environmental protection among school kids,    4    often feel greatly refreshed by appreciating the grace of the adorable creatures through cameras.

Among the selective courses     5    (be) the restoration of small and micro wetlands .As for this course, what is needed is a lot of hands-on practice. Under the    6    (guide) of their teachers, students are required to conduct a research on a 500-square-meter wetland in the city parks. Focusing their attention    7    the wetland’s physical condition, they have recorded the number of plant and animal species to create a restoration plan. Thanks to    8    (they) efforts, the biodiversity of the wetland has been significantly improved.

“It’s very meaningful,” said Li Chenliang,    9    eighth grader from this project. “I have learned a lot of knowledge that cannot be    10    (direct) got from books. I should make full use of the city’s ecological advantages and get more chances to get closer to nature.”