In December 2018, a bunch of friends and I went to Europe to travel. Upon arrival in Vienna, we got the keys to the house from its owner. The     1     (decorate) of the house was quite good.

In Vienna, if anyone wants to copy a key, he or she is expected     2     (prove) their ownership of the property (房产) the key is for. It’s also really expensive. An ordinary key usually costs 150 euros (1.170 yuan). As the person in charge of the keys, I had a great responsibility.

    3     next day, we went everywhere, including the Sisi Museum and a coffee shop in the city center,     4     had dinner in a fancy restaurant. We felt quite relaxed. While we     5     (enjoy) dinner, my friends came up to me, asking for the keys so they could leave early. It was then that I realized that I’d lost them.

The host asked us to give him 300 euros to cover the cost of a new set of keys. We made a complaint about it but we had to pay the money. So, hoping to get our money back, we decided to do some detective work     6     our own.

I wrote an email to the Sisi Museum in the middle of the night, wondering whether the staff had found them. Early in the morning, I received their reply, saying that they had not.

    7     (fortunate) in the end, the keys were found in a souvenir shop. The host even said congratulations to us.

Though we saw many great     8     (sight) in Europe, the most     9     (value) thing about my trip was this lesson I learned: Never lose your keys in Vienna. Your keys ought to     10     (take) good care of.

3 . I live in a town near Prague(布拉格), the capital of the Czech Republic. Besides cars, bikes are the most important _________ of transportation(运输). As it _________ you to go almost anywhere you want, cycling is a big _________ for Czech people. On weekends, you can see cyclists _________ through the towns wearing helmets (头盔) and cycling clothes.

Some people _________ that living in a town is inconvenient (不便利的), including me. _________, I find life in towns much more _________ than that in big cities after living here for a while. I was _________ given a bicycle by my host family. _________ it is only an ordinary bike, I was still __________ and couldn’t wait to take a cycling trip alone.

One sunny Sunday afternoon, I took my first cycling trip to a village nearby. I cycled for a while, alongside a river. But then, something happened: One of my tires __________. There was no choice but to __________ my bike back home, which took an hour.

I didn’t give up though: One week later, I __________ again. This time, however, there was__________ wrong with my tires. It was a very beautiful town, with a typical Czech castle and a park full of peacocks. People were taking part in a marathon that day. There were also stands selling __________ Czech foods and drinks, such as potato pancakes and beer.

It was already sunset when I __________ to head home, and I saw almost no one on the way back. As the warm breeze softly stroked (轻抚) my face. I felt very __________ and happy.

I believe many of us need a(n) __________ like this to take a break from our __________ life sometimes. So, I really do encourage all of you to take a cycling trip alone, even just to a nearby village. Just look around you, and you’re sure to __________ some hidden beauty.

4 . Shenyang—The remains of 117 Chinese People’s Volunteers soldiers killed in the 1950-53 Korean War returned to China on Sunday before the Commemorative Day of Martyrs.

This is the seventh annual repatriation (遣送), following a handover agreement signed between China and the Republic of Korea. and also the largest since the initial (最初的) return of 437 soldiers in 2014. Between 2014 and 2019, the remains of 599 soldiers were returned.

Earlier on Sunday, the ROK handed over the remains at a ceremony at Incheon airport outside Seoul. A Chinese military transport plane, escorted (护卫) by two Chinese fighter jets, carried the remains and belongings of the fallen soldiers back and landed at Taoxian International Airport at 11:18 am in the northeastern Chinese city of Shenyang near the border of the Democratic People’s Republic of Korea. Y-20 aircraft. the largest and most advanced domestically developed transport aircraft. carried out the task for the first time. It was labeled (贴标签于……) with the serial number 01. as a mark of high respect for the martyrs.

Vice Premier Sun Chunlan attended the ceremony along with CPV soldiers and citizens. China has never forgotten its fallen heroes and the contribution they made, Sun said in a speech.

Chinese people always remember the fighting spirit of defending the motherland, and China will remember the past and cherish peaceful international environment, Sun said.

Wang Guobin, a 92 year old CPV veteran, said. “I’m both happy and sad. I’m glad that after 70 years, they finally come home. And I am sad that they died in the 1950-53 Korean war and couldn’t come back until 70 years later.”

Many local residents lined the roads to welcome the martyrs home and show their respect.

The remains will be buried in a martyrs’ park in Shenyang on Monday. It is the resting place of all soldiers’ remains returned by the ROK since 2014.

This year marks the 70th anniversary of the CPV’S participation in the 1950-53 Korean War. A total of 2.9 million CPV soldiers entered the battlefield, and 197,653 of them were killed in the war.

7 . It might seem like something from a science fiction movie, but scientists today are working on ways to combine certain kinds of bacteria with tiny robots. Scientists want to use these creations to improve the way we give medical treatment. They claim that drug therapy (疗法), disease diagnosis, and even surgery could be greatly aided by the use of nanobiotechnology. Nano-means “tiny”, and bio-means “life”. This tiny technology will use living organisms in combination with electronics.

Electronics makers already use tiny robots to build complex but very tiny circuits. Medical scientists want to use these robots to repair patients’ damaged organs or to direct medicines to affect specific cells. For example, tiny robots could be engineered to deliver chemotherapy (化疗) directly to cancer instead of to the entire body.

Existing electronics are the right size, but they lack practical use. Robots that can be built small enough to enter a person’s cells would be too tiny to move on their own. Therefore, scientists want to use tiny organisms such as bacteria to act as vehicles for the robots. The bacteria will be “driven” through the bloodstream by magnetic pulses (磁脉冲). Once the bacteria are in the correct locations, the robots will be able to do their jobs. In theory, these robots will cause less damage to the body than traditional methods of delivering medicines or performing surgeries.

Nanobiotechnology has yet to be put into practice, but many people already have concerns about its use. Some people worry about the ethic (道德标准) involved with controlling live organisms—and the possible side effects for their human hosts.

8 . Humans have explored space beyond Earth’s atmosphere for over half a century. When astronauts explore the vast area of outer space, they need to wear high-tech spacesuits to protect them from the dangerous conditions of the universe.

A spacesuit is made up of nearly a half dozen different components(部件) and can have up to 16 layers, according to NASA. From start to finish, it can take up to four hours for an astronaut to dress up, said Cathleen Lewis, leader of international space programs. Before going on a spacewalk, astronauts must check each piece of equipment and make sure they have enough important supplies, such as oxygen and water.

The astronauts on the Artemis missions, NASA’s next program to send the first woman and the first person of color to the moon, will wear the latest spacesuit, known as xEMU. One of its main components is the cooling garment, said Richard Rhodes, leader of xEMU pressure garment development at NASA. The garment is made of tubes that circulate water around the astronaut, regulating body temperature and removing extra heat as they complete their work. Each spacesuit has a portable life-support component, which includes a water tank for the cooling garment, carbon dioxide removal system and more.

The original spacesuits used during the Apollo missions were less flexible than the ones today. Fortunately, spacesuits have come a long way since then and have a more flexible structure. On the outside of a spacesuit, there are colored stripes(条纹)unique to each suit. This is how astronauts can tell who is in each suit when out in space, Lewis said. This tried-and-true system will be used for the Artemis spacesuits.

Rhodes said the biggest challenge for the Artemis suits is making sure they are upgraded for lunar exploration. The suits need to be “light enough to support the lunar mission and strong enough to protect the astronaut while working in the very hazardous lunar environment,” he said.