Taking an afternoon snooze (小睡) could keep your brain sharp, a new study has said.

Researchers analyzed napping habits in 2,214 older Chinese people and measured their cognitive (认知的) abilities by     1     (use) several cognitive tests. Participants     2     (take) the Mini-Mental State Examination and the Beijing version of the Montreal Cognitive Assessment, both of     3     test for memory, language and other cognitive abilities. In every category listed in the study, nappers tested higher on average compared     4     their non-napping peers(同龄人).

Sleeping behaviors can     5     (affect) by a number of causes, said Dr. David Neubauer, associate professor at Johns Hopkins University School of Medicine. “Daily routines, medication use, environmental factors, lifestyle     6     (choice) and sleep disorders can all play a role in how     7     (frequent) someone takes a nap,” he said.

Neubauer recommended taking a shorter “power nap” of up to 20 minutes to decrease the chances of transitioning into slow-wave sleep, which makes people feel     8     (sleep) when they wake up. Napping can be     9     healthy part of an older adult’s day, Neubauer acknowledged, but make sure sleepiness isn’t due to a treatable nighttime sleep disorder. “Older individuals who want to do all they can     10     (preserve) their cognitive functioning should attach more importance to nighttime sleep.”

Spring Festival is the most important of the traditional Chinese festivals. It    1     (call) “Lunar New Year”,   because — as part of the lunisolar (阴阳的) Chinese calendar — the date is partially determined based on lunar phase (月亮或行星的相位). The festival traditionally     2     (begin) on the first day of the first month in the Chinese calendar and ends with Lantern Festival    3     is on the 15th day. Chinese New Year's Eve, a day when Chinese families gather for their annual reunion dinner, is known as Chu Xi. It literally means “Year-pass Eve”.

According to    4     (tale) and legends, the beginning of Chinese New Year started with the fight against    5     mythical beastv(神兽)called Nian.   Nian would come on the first day of New Year to devour livestock (牲畜), crops, and even villagers,     6     (particular) children. To protect    7     (them),   the villagers would put food in front of their doors at the beginning of every year. It was believed that after the Nian    8     (eat) the food they prepared, it wouldn't attack people any more. One time, people saw that the Nian was scared away by a little child wearing red. The villagers then understood that the Nian was afraid    9     the colour red. Therefore, every time when the New Year was about to come, the villagers would hang red lanterns and red spring scrolls on windows and doors. People also used fireworks    10     (frighten) away the Nian. From then on,   Nian never came to the village again.

With the approach of the Palace Museum's 600^th anniversary, those     1       (hope) to visit it during the National Day holiday may find     2     difficult to get in. Since the COVID-19 pandemic     3     (break) out, it has limited the ability of visitors to experience the museum     4     person - only 12,000 visitors a day are allowed in. Meanwhile, tickets,     5     can be available 10 days in advance online, also have been sold out immediately. While some     6     (previous) scheduled events have been canceled, visitors can still appreciate three highlighted exhibitions     7     (hold) next month. The exhibitions will present a large number of cultural remains and also give a brief introduction to Chinese aesthetics (美学). Additionally, a series of·    8     (academy) activities, along with the exhibitions,     9     (organize) at the museum. The director of the Palace

Museum hopes that all these activities can raise people's     10    (aware) to treasure and protect our heritage and promote cultural value of this era.

Festivals are celebrated all around the world. They have     1     wide range of origins, such as the seasons of the year, religions, famous figures, and important events. Every festival has its different customs and unique charms. However, no matter     2     different they may seem, you may be surprised to find that different cultures actually have a lot     3     common, such as the aim to share joy, gratitude, love, or peace is common in all festivals around the world.

Customs play a     4     (significance) role in festivals, but sometimes they can change over time. Some traditions may fade away and others may     5     (establish). One example is the typical Chinese Spring Festival custom of     6     (light) firecrackers to drive away the evil spirits and celebrate the New Year. Nowadays, many big cities     7     (forbid) this custom in order to avoid air pollution.

Festivals are an important part of society. They reflect people's     8       (wish), beliefs, and attitudes towards life. They are occasions     9     allow us to relax and enjoy life. They also help us understand where we came from, who we are, and what     10     (appreciate).

You may notice just how much food waste we create     1     you often cook at home this year. Even if we are careful not to waste edible food, wastes like potato     2     （skin）, banana peels, and apple cores pile up.

Food waste is a major problem     3    (global), We waste or lose about a third of all the food we grow. There are a lot of wasted resources: Wasting the land on which the food    4    (grow), the energy that is used to grow, transport, and process it, wasting water, wasting money and wasting work. On top of it all, landfilling food waste emits the potent greenhouse gas methane (甲烷)，which leads    5    climate change.

But a coalition of the world's giant food companies strongly support     6    new initiative (倡议)that aims to tackle this problem. How? By preventing waste whenever we are possible. And by turning what can't    7     (prevent) into renewable energy.

Earlier this month, renewables company Vanguard Renewables made an     8     (announce) that it would join Starbucks, Unilever, and Dairy Farmers of America    9     (establish) the Farm Powered Strategic Alliance (FPSA). It aims to turn unavoidable food waste into renewable energy by    10     (use) on-farm anaerobic digesters. It is high time that we should save food.

Nowadays, social networking addiction has become a rising concern.Social networking addiction is a phrase sometimes used     1    (refer) to someone spending too much time using Facebook, Twitter，Instagram and other forms of social media—so much that it     2    (influence) other aspects of daily life.

Addiction usually refers to habitual     3    (behavior) that are difficult to control and it may lead to negative effects.In most addictions, people feel forced to do certain activities so often that they become a harmful habit,     4    then affects other important activities such as work or school.

In that context, a social networking addiction could     5    (consider) someone with a powerful inner drive to use social media repeatedly—     6    (constant) checking Facebook status updates or following people's profiles on Facebook, for example, for hours on end.

But it is hard to tell when fondness for     7    activity becomes a dependency and crosses the line into a damaging habit or addiction.Does     8    (spend) three hours a day on Twitter reading random tweets from strangers mean you're addicted     9    Twitter? How about five hours? You could argue you were reading headline news or     10    (need) to stay current in your field for work, right?

At the delivery ceremony in Beijing last Saturday morning, the sample     1     (bring) back by China's Chang'e 5 was handed over to the president of the Chinese Academy of Sciences.

As it returned successfully, Chang’e 5     2     (become) the first lunar sample-return spacecraft since 1976. The sample,     3     includes 1,700 grams of lunar rocks and soil, is larger than previous ones. The great increase in its weight can be owed to Chang'e 5's lunar orbit unmanned docking (会合) program, in which the two parts of Chang'e 5 can     4     (automatic) combine into a whole in orbit.

It is also important to note that the greatest     5     (amaze) of the journey is Chang'e 5's lunar landing site-referred to     6     the Ocean of Storms-on the near side of the moon, where no probes (探测器) have paid     7     visit before. It's geologically younger than the sampling     8     (area) of the US and the former Soviet missions, so the new sample will help fill in an important piece of the puzzle of the Moon’s history.

The delivery marked the start of research into the sample, the administration said in a statement,     9     (add) that it will not merely publish guidelines on the sample's distribution and use,     10     will also encourage scientists from around the world to participate.

China has landed lunar probe （探测器）on an unexplored area of the moon     1     （successful）. The probe will remain on the moon collecting soil and rock samples until Thursday, guided by mission control on the ground. The robotic spacecraft     2    （name） Chang'e 5 after the Chinese goddess of the moon drilled into the surface of the moon to collect soil early Wednesday.

It's the first attempt     3    （get） rocks from the moon by any country since the 1970s. The samples, which     4    （expect） to weigh about 2 kilograms, will be sealed （密封） into a container in the spacecraft.

If successful, the mission will make China     5    third country to have got lunar samples, following the United States and the Soviet Union     6    （decade） ago.

When the samples are returned to Earth, scientists will be able to analyze the structure     7    material composition （组 成）of the moon's soil. The mission may help answer questions such as how long the moon remained in space, and when the magnetic field （磁场）of it — key to protecting any form of life     8    the sun — disappeared.

The spacecraft landed on an unvisited area of the moon, known as Oceanus Ocean of Storms. The landing     9    （mark） the third time a Chinese lunar probe has landed on the surface of the moon,     10    also makes the whole Chinese proud.

The Tokyo 2020 Olympics,     1     sponsorship revenue (赞助收入) has exceeded $3.1 billion,     2     (reschedule) to be held from July 23 to August 8 in 2021 due to the COVID-19 pandemic,     3     (shorten) the Olympic marketing period for the Beijing Winter Olympics—to be held in February 2022—by a year. 

Ren Hai, a professor at the Olympic Research Center, claimed on Tuesday, “There will of course be     4    impact, but I think the impact will be limited, as the Summer Olympics and Winter Olympics are different in terms of sports and disciplines,” Ren said. “    5     (history), the two different Olympics were hosted very close together.” Ren     6     (refer) to the period from 1924 to 1992,     7     both the Winter and Summer Olympics were held in the same year.

He Wenyi, executive director of the China Institute for Sports Value, said the reason     8     the limited impact on Winter Olympics marketing is     9     China has relatively few winter sports stars. “The promotional events of Beijing 2022 are unlikely     10     (affect), as the COVID-19 is under control in China.” He Wenyi added.

Cave No.12 of the Yungang Grottoes (石窟), the 1,500-year-old masterpieces of Chinese Buddhist art, has been recently “moved” to the Zhejiang University Museum of Art and Archaeology by 3D printing technology,     1     (bring)the grottoes to the wider world.

Cave No.12,14 meters deep,11 meters wide and 9 meters high, also known     2     the Music Cave, was carved with rich images of heavenly figures and     3     (music)instruments from home and abroad. These figures represented the     4     (early) royal symphony orchestra (乐团) in ancient China.

The researchers     5     (overcome)many difficulties since August 2016.First,the project team spent three months laser-scanning (激光扫描) the cave and took 55,680.     6     (photo) of it.     7     (ensure) successful printing, a special 3D printer was tailored for the project. Then,     8     came after 3D printing was the coloring process, during which the images in the cave     9     (expect) to be covered with proper materials and colors. After eight months of coloring, the staff finally completed the replica cave. Experts believe that the completion of the project marked technical breakthroughs and     10     very important step forward in digital protection and inheritance of cultural heritages.