Chengdu is regarded by many as one of the happiest cities in China, as well as the home of pandas. It     1     (become) the first Asian city to be identified as a UNESCO City of Gastronomy in 2010.

Chengdu is a place where it seems to blur (难以区分) the boundaries between past and future. Its ancient temples, traditional alleys and historic architecture open a window into ancient China,     2     (take) you into a world of past impressive beauty. But what is really surprising is its focus on the future. Transforming into a center of technology, innovation and development, this city has     3     (ambition) plans to become a science city in southwest China.

Chengdu is not only rich in history and modernity, but also in flavor. This city is known     4     its spicy food, with bold flavors and centuries-old cooking traditions coming together to offer dining experiences     5     will delight all the senses. Chengdu’s most popular food, such as tongue-numbing mapo tofu and hotpot, is     6     feast for the palate (味觉). Hotpot works like this. A heat source     7     (place) on the dining table keeps a pot of soup stock simmering (煨), and a variety of Chinese foodstuffs and     8     (ingredient) are served beside the pot for the diners to put into the hot stock.

All this richness that Chengdu has to offer led to its selection as the host city for the 31stFISU World University Games. The athletic event was an opportunity not only     9     (show) Chengdu’s sporting spirit, world-class infrastructure,     10     (warm) and organizational skill, but also to promote friendship and cross-cultural understanding.

Marine biology is the study of the ocean’s plant and animal life. Marine life gives us food, medicine and other raw materials we need. It also supports tourism and provides us with an area of recreation.

    1     (difference)forms of life live in various areas of the ocean. Some are limited to coastal and shelf areas, while others live in the open sea.

Coral reefs     2     (find) in the tropical areas of the world, but they can also exist in colder water. Reefs are built by corals and other     3     (animal)that leave calcium on rocks. They are home to     4     vast variety of life forms. About half of the world’s coral reefs, however,are     5     danger because of global warming and a rise in sea temperatures.

Although we do not know very much about    6     kind of life forms exist in deep ocean trenches(深海沟), marine scientists have found a certain type of jellyfish(水母) in the Mariana Trench, the world’s     7     (deep)ocean area. These parts of the ocean     8     (usual)have little or no sunlight and many organisms(生物)here have to produce light     9     (they).

Marine scientists also study how waves and currents affect organisms     10     (live)in the oceans.

Emerging evidence in humans suggests a     1     (typical) Western high-fat, high-sugar junk food diet can quickly weaken your brain's appetite control.

After offering volunteers a week-long binge (大吃大喝) of waffles, milkshakes and similarly rich foods, researchers in Australia found young and healthy ones scored worse on memory tests and experienced a     2     (great) desire to eat junk food, even when they were already full.

The findings suggest something is special in the hippocampus (海马体)-a region of the brain     3     supports memory and helps to regulate appetite. When we are full, the hippocampus is thought to quieten down our memories of delicious food, thereby     4     (reduce) our appetite. When it’s interrupted,     5     control can be seriously damaged. Over the years, extensive research on     6     (mouse) has found the function of the hippocampus is very sensitive to junk food, but recently this has been observed only in young and healthy humans.

In 2017, after a week of Western-style breakfasts of     7     (toast) sandwiches and milkshakes, researchers found participants performed worse on learning and memory tests which are typically dependent     8     the hippocampus.

Now, in this latest study the scientists of the team     9     (find) that not only do such high-fat, high-sugar diets impair memory in humans, but they appear to directly affect our ability     10     (control) our appetite.

Khamisi Ally Abdi, a 25-year-old African student in Cangzhou Technical College, Hebei province, has practiced tai chi for two years. Having worshiped kung fu stars such as Bruce Lee, Jackie Chan as a child, the Tanzanian understood Chinese kung fu to be     1     fast-paced attack and defense art before he     2     (arrive) in China, but now he realizes tai chi is different. It is tai chi moves with balance and deep rhythmic breathing     3     allow him to feel the charm of the exercise. It brings peace and     4     (calm) to his mind while building his muscles.

The college, as one of International Exchange centers,     5     (enroll) (录取) more than 300 international students from over countries since 2016,     6     (main) countries along “the Belt and Road”, providing a tai chi course for all foreign students.     7     (practice) tai chi has led Abdi to acquire a comprehensive appreciation of this Chinese culture and ideology. He now prefers people     8     (call) him by his Chinese name Chen Yanzhi, as the characters of Yanzhi carry the meaning of talented and virtuous. The art has inspired his understanding of China.     9     he is longing for is teaching tai chi in his country and he expresses hope that this magical kung fu can be     10     (benefit) to more people.

On Monday, a park in Arouca, Portugal opened a record-setting new bridge. Though it's quite high, it's the     1     (long) of the bridge that has set a record. The 516-meter-long bridge     2     (run) between two mountains in Arouca Geopark in Portugal.

It's a suspension bridge,     3     means that it hangs between its two ends without any supports underneath. The builders say the bridge was inspired by suspension bridges     4    (build) by the ancient Inca people in South America. The 516 Arouca, made mainly of metal was started in May, 2018. It cost $2.8 million, and took over two years     5     (complete).

Arouca Geopark is well-known for its beautiful natural scenery and the many outdoor     6     （activity） that can be done there. But because of the coronavirus pandemic, the number of tourists in the area has been low. Though the bridge was finished last July, it wasn't     7     （official） opened until Monday.

City leaders think the bridge could attract people for a lot of different reasons. Some might come for the scenery. Others might come to see     8     the bridge was built. The website for the bridge describes the walk     9     "the most exciting 516 meters of your life". If you walk quickly, it's possible to cross the bridge in     10     （little） than 10 minutes. But many people will want to enjoy the safe, but scary experience of walking across.

Etenesh Diro had almost completed two thirds of the 3000m long-distance running when she was knocked down     1     some other competitors. She fell and her right shoe     2     (start) to come off. One after the other, the runners overtook her. She threw the shoe away to get up     3     (quick). Running the rest of the race with just one shoe on and her right foot bare raised a big cheer for her. Luckily, she     4     (give) a chance to compete in the final. Losing a shoe didn’t keep her from taking part. This is the true spirit of sport.

Earth is home to millions of different species. Some can be very small, like bacteria and viruses, which are so small that we cannot see     1     (they) with only our eyes. By contrast, the largest animal species so far found on our planet is the blue whale,     2     can grow up to almost 30 meters in length. The toughest species is probably the water bear. This tiny organism can survive temperatures from 150℃ to a below freezing -272℃.     3     (survive) in their environment, each species has developed its own unique physical characteristics.

At eight p.m., February 17, 2021, 2020 “Touching China” was broadcast on CCTV integrated channel CCTV-1. The “Touching China” award has been held every year since 2003,     1     honors ten of China’s role models carefully     2    (select) by people.

One of the ten role models, wang Hai, is a former MiG-15 fighter pilot and air force     3    (command) who led the People’s Air Force’s young No. 1 Brigade and fought more than 80 fierce     4    (battle)with the US Air Force during the War, to Resist US Aggression, and Aid Korea. And Ye Jiaying is an expert of Chinese Classical Literature     5    (make) a significant contribution to the spread of Chinese culture. There is no doubt that those extraordinary people can have an outstanding influence    6    our country. However, even nobodies can burst out with great power.

Wan Zuocheng and Xiong Gengxiang are     7     ordinary couple living in Nanchang, Jiangxi. They     8    (operate) an open-air kitchen near Jiangxi Cancer Hospital since 2003 to offer a helping hand to cancer patients. So far this kitchen has not only witnessed the joys and sorrows of a large quantity of people over the past eighteen years, but also     9    (continuous) conveyed the love and warmth of home. The couple’s initial intentions were very simple: “Some diseases can’t     10    (cure), but the patients can eat better, and the family members can have less regret.”

You may remember back at the start of December,     1     China carried out their unmanned Chang’e-5 mission and the spacecraft touched down on the moon to collect samples for research. Now it     2    (success) returned to the Earth. This is the most significant event in China’s space field, and also one of the most notable space     3    (activity) globally. Chang’e-5,     4     (launch) by a Long March 5 heavy-lift carrier rocket early on Nov 24, is the nation’s     5    (large) and most complex lunar probe. It returned with 1,731 grams of lunar rock and soil to the Earth,     6    (mark) a historic accomplishment 44 years after the last lunar substances were taken back. The 23-day mission was China’s first space journey to claim extraterrestrial samples, making     7     the third country to accomplish the task, the first being the USA in the 1960’s and the second Soviet Union in the 1970’s.

The spacecraft     8    (enter) the Earth’s atmosphere at an altitude of around 120km. As soon as it was 10km above land, it released its parachute and landed smoothly in China's Inner Mongolia. Now the spacecraft has been air lifted to Beijing where the samples     9    (examine) by scientists very soon.

The mission’s results will contribute     10     mankind’s deeper understanding of the moon’s origins and the evolution of the solar system.