Kunqu Opera (昆曲),also known as Kun Opera, is a kind of Chinese musical drama (戏剧).But it is more than just drama. It is actually a kind of art{#blank#}1{#/blank#}history, music, dancing and others.

It is {#blank#}2{#/blank#}believed that Kunqu Opera is the beginning of all the other forms of Chinese opera. With a long history of over 600 years, Kunqu Opera started in the city of Kunshan at the end of the Yuan Rynasty. It became quite {#blank#}3{#/blank#}in the Ming and Qing dynasties. In 2001,Kunqu Opera was {#blank#}4{#/blank#}as one of the Masterpieces of the Oral and Intangible Heritage of Humanity (人类口述和非物质遗产代表作).

    Imagine one day, the water taps in your house stop running. You have to buy water from shops. And still there {#blank#}1{#/blank#}water for everyone. Your mother has to save the family's shower water to do other things. Would you be able to stand that kind of life?

    Probably not. But that's what kids in Yemen are experiencing. Experts said Yemen is going to be the first country in the world to run out of water. {#blank#}2{#/blank#}a report, the capital, Sana'a, will run out of drinking water as early as 2025.

    Because of the shortage, the government often cuts the water supply. Hannan, an 18-year-old girl from Lahej, told the Times: "In a good week we'll have the water supply all week. But then the following week there will be water only for {#blank#}3{#/blank#}."

    Hannan said only rich people have enough water to use. They can buy water from the shops or from the water trucks. Private companies own the trucks. They {#blank#}4{#/blank#}every day to sell water—at very high prices. "A lot of people can't afford it," she said.

    The government is {#blank#}5{#/blank#}making use of seawater. But it will cost a lot and it may not happen soon enough to help the people of Yemen.

    Many people know that rubbish is a big problem on planet Earth. What many people don't know is that junk (垃圾) has become a problem in outer space too.

    According to BBC News, there are more than 22, 000 pieces of space junk floating around the earth. And these are just the things that we can see from the surface of the earth by telescopes (望远镜). There are also millions of smaller pieces of junk that we can't see.

    Objects, like bits of old space rockets or satellites, move around the planet at very high speeds, so fast that even a very small piece can break important satellites or become dangerous to astronauts. If the tiniest piece of junk crashed into a spaceship, it could damage the vehicle.

    To make things worse, when two objects in space crash, they break into many smaller pieces. For example, when a U. S. satellite hit an old Russian rocket in 2009, it broke into more than 2,000 pieces, increasing the amount of space junk.

    To reduce additional space junk, countries have agreed that all new space tools can only stay in space for 25 years at most. Each tool must be built to fall safely into the earth's atmosphere after that time. In the upper parts of the atmosphere, it will burn up.

    Many scientists are also suggesting different ways to clean up space junk. In England scientists are testing a metal net that can be fired into space junk. The net catches the junk and then pulls it into the earth's atmosphere to burn up. The Germans are building robots that can collect pieces of space junk and bring them back to Earth to be safely destroyed.

    "The problem is becoming more challenging because we're sending more objects into space to help people use their mobile phones and computers," says Marco Castronuovo, an Italian space researcher.

    "The time to act is now. The longer we leave the problem, the bigger it will become," he says.

Animals

    Corona viruses are common in animals. Sometimes, animals get infected (感染的) with these viruses which may then spread to human beings. To protect yourself, you should not visit live animal markets or have direct contact with wild animals. Stay away from raw meat, animal organs and other undercooked animal products.

    When an infectious pet was found in Hong Kong, some may wonder if one can get virus from their pets. Until today, there is no evidence that a dog, cat or any pet can transmit (传播) COVID-19. Please do not kill or give up pets!

Touching surface with virus

    Studies suggest that COVID-19 virus may stay on surfaces for a few hours or up to several days. However, the number may change under different conditions such as type of surface, temperature or the environment.

    If you think a surface may be infected, clean it with ethyl alcohol (酒精). After touching it, clean your hands with alcohol or wash them with soap and water. Avoid touching your eyes, mouth, or nose.

Package (包裹)

    Before delivering to your home, a package has been moved, travelled, and exposed to different conditions and temperature. Therefore, the possibility of being infectious because of your package from COVID-19-reported areas is rather low. There is no need to send your package back.

Smoking

    An article posted on Wechat recently says that cigarette can protect smokers from COVID-19 and thus make cigarettes sell very well. It is an online rumor (谣言)! As has been known, smoking harms people's health. It weakens the immune system and worsens diabetes and blood pressure. No smoking is still a must!

Transportation

    According to Feng Luzhao, an expert from the Chinese Center for Disease Control and Prevention, the major routes of transmission are still through respiratory droplets and direct contact. In order to protect yourself in underground station, wearing a mask and keeping your hands clean are good ways. People are also encouraged to use a personal transportation card or pay for the ticket via an app. After taking public transportation, washing hands is necessary.

Zhou Dao's grandfather has a hearing problem. During a family party last year, Zhou Dao noticed something. His grandfather sat quietly by himself. The old man was unable to join the talks.

Zhou Dao was sad about this. "Grandpa always reads subtitles (字幕) to watch TV," he thought. "Why can't we put words on our talks?" Then, Zhou Dao began working on that idea. He spent about half a year developing a kind of smart glasses. These smart glasses help users "read" spoken words.

The glasses are connected to a smartphone. There is a microphone on the glasses. It records audio (录制音频) and sends it to the phone. A piece of software turns the audio into words. People can see the words on the glasses.

This allows users with hearing problems to understand others during the talks well. Now Zhou Dao's grandfather can wear the glasses and speak to someone else face to face or over the phone.

Zhou Dao was happy to help his grandfather. Slowly, more and more people in need can wear this kind of glasses.