We humans love to stare into our smart devices. We gaze for hours—about 10 hours and 39 minutes a day—at our computers, smartphones, tablets and televisions. Is all this staring bad for us? It might be, mainly because as we stare at our devices we are exposing ourselves to blue light.

    Blue light is a type of electromagnetic radiation with a very short wavelength that produces a high amount of energy. While it's true that light can damage our eyes under certain circumstances, there's no scientific evidence suggesting that blue light is harmful to our eyes. But many people still think it is, which is why blue—light—blocking glasses are so popular. So, do the glasses work?

    "Everyone is very concerned that blue light may be causing damage to the eye, but there's no evidence that it may be causing serious damage," Dr.Rahul Khurana, a clinical spokesman, told Business Insider.

    Blue light exposure is nothing new. In fact, the sun is the largest source of blue light. Moreover, blue light is also present in LED light. But if blue light isn't harmful, then why are we constantly rubbing our eyes when we're looking at our screens? The answer is eyestrain(眼疲劳). More than 60 percent of people experience eye problems associated with digital eyestrain. And blue light, it seems isn't the cause. Instead, our eyes are so strained because most of us blink less when we stare at our digital devices. So, if eyestrain is the real issue, blue-light-blocking glasses are probably of little use.

British Museum

    Located in Great Russell Street, London WC1B 3DG, the British Museum houses a vast collection of world art and artifacts and is free to all visitors. The British Museum's remarkable collection spans over two million years of human history and culture, and it has more than 7 million objects, so it would probably take a week to see everything.

    Over 6 million visitors every year experience the collection, including world-famous objects such as the Rosetta Stone and Egyptian mummies.

    Admission and opening times

    Free, open daily 10:00 to 17:30.

    Open until 20:30 on Friday, except Good Friday.

    Closed on 24, 25 and 26 December and 1 January.

    Large luggage, suitcases and cabin baggage

    For everyone's safety, all bags, packages and personal items may be searched before entry. Wheeled cases and large items of luggage are not allowed on British Museum for safety and security reasons. Storage for luggage is available at major rail stations, including Euston, King's Cross and Charing Cross.

    Membership

    Membership allows you to discover 2 million years of human history with free unlimited entry to special exhibitions, an exclusive discount offer on magazine subscription(订阅) and many more benefits.

    Individual membership:£74

    Under 26 membership: £54

    Young friends (ages 8-15 ): £25

    Shops

    The Museum has four shops where you can buy books, souvenirs, and family gifts.

    In 2010, I left the United States for the first time to fly over 9,000 miles to Uganda, a country in recovery from civil war. I was going there to help the local kids learn soccer.

    As I played soccer with some kids, the sun burned my skin. I took many breaks to drink from my water bottle before realizing I was the only one who did that. All the energetic children running around never stopped to get water. After looking around, I realized there was NOWHERE for them to get water, and there was no well or water pump in sight.

    I asked a man who was traveling with us why the kids didn't ever stop to drink water. He told me that they would have to walk all the way to the pump in the next village and they didn't want to miss out on playing soccer with a real ball. The kids seemed happy but it was not fair that to get a drink of water meant they would miss out on such a rare occurrence of playing with an actual soccer ball.

    When I got home, I spoke with other people about kids in Uganda. They told me to do something to help them. That sounded like a great idea, but how? I spoke with my friends about helping kids in Uganda. We decided that we could try to solve their most urgent problem—water. And we decided to organize soccer camps to collect money.

    It has been three years since our first camp and we have successfully run two more and funded two water filtration (净化) systems as well as 60 water pumps for farmers. We have been able to improve the health of thousands of Ugandans.

    An idea that started in Seattle's public library has spread throughout America and beyond. The concept is simple: help to build a sense of community in a city by getting everyone to read the same book at the same time.

    In addition to encouraging reading as a pursuit(追求) to be enjoyed by all, the program allows strangers to communicate by discussing the book on the bus, as well as promoting reading as an experience to be shared in families and schools. The idea came from Seattle librarian Nancy Pearl who launched(发起) the "If all of Seattle Read the Same Book" project in 1998. Her original program used author visits, study guides and book discussion groups to bring people together with a book, but the idea has since expanded to many other American cities, and even to Hong Kong.

    In Chicago, the mayor (市长) appeared on television to announce the choice of To Kill a Mockingbird as the first book in the "One Book, One Chicago" program. As a result, reading clubs and neighborhood groups appeared around the city. Across the US, stories emerged of parents and children reading to each other at night and strangers chatting away on the bus about plot and character.

    The only problem arose in New York, where local readers could not decide on one book to represent the huge and diverse population. This may show that the idea works best in medium-sized cities or large towns, where a greater sense of unity(一致) can be achieved. Or it may show that New Yorkers rather missed the point, putting all their energy and passion into the choice of the book rather than discussion about a book itself.

    Finally, as Nancy points out, the level of success is not measured by how many people read a book, but by how many people are enriched by the process or have enjoyed speaking to someone with whom they would not otherwise have shared a word.

    Travelling is a great way to interact with a culture which might be completely different from your own.

     Before I moved to Sicily I had travelled around the whole of Italy, the south and the north, and I absolutely fell in love with the culture and the language, so I was inspired to learn the language and also to move here. And here I am now, living in Sicily.

    When you get back home you'll have lots of stories to tell your friends and family. Even if something isn't very fun, it will be funny to look back and laugh at those awkward or harsh moments. For example, I was travelling with a group of friends in Pisa and we took the wrong bus to get to the beach area, so we ended up being stuck in the rain and having to walk back.

    When you travel, you expose yourself to different people.It's a great learning experience for both you and the other person because you can share and exchange your own ideas and opinions on a range of topics. For example, I met an Iranian philosopher and we talked about the nature of magic. A lot of his ideas were shaped by his Iranian background and Iranian philosophy.

    Travelling is the realization of home.Since I've been away from London, I've come to appreciate the little things that I used to take for granted, like our amazing transport- everything runs on time; everything runs well. So sometimes it takes being away from home to realize how much you absolutely love your hometown.

A. It was a really interesting discussion.

B. Travelling will make you a really good storyteller.

C. Travelling could enrich your awareness of the world.'

D. They may have a completely different outlook on life.

E. We realize how much we miss our hometown when we travel.

F. Travelling might just convince you to move to another country.

G. Being away from home, we miss our friends and our family very much.

    Reggie couldn't hear a thing. He was a 1 boy, but he had been born deaf. He was well-known to everyone in town, and they were all 2 him. Unfortunately, though, he 3seemed to end up being treated differently from everyone else. Children worried they would 4him, and that maybe because he wouldn't hear the ball being hit in his 5. Adults acted like he was unable to 6 them, as though he was some kind of baby.

    His friend Michael didn't like this. He decided that things had to be 7. Michael's father was the town's mayor, and Michael 8 to convince him that this year, in honor of Reggie, they should offer one day of the 9 to deaf people. During that whole day everyone would have to wear earplugs(耳塞).

    People liked the 10. The day became known as The Day of Silence, and when it arrived, everyone stuck plugs in their 11, in a spirit of great fun. That morning was filled with 12 and laughter. But, as the hours passed, people became more and more aware of how 13 life was when they couldn't hear anything.

    On that day, nobody was thinking of Reggie as just a 14person. This meant he could be 15 just like any other boy, and people saw a whole new side of him. Not only that, but Reggie had a(n)16 and sharp mind. On that day, using his usual 17, Reggie was the one who could communicate best with everyone. This meant that people paid more attention to what he was saying, and they were 18 by his intelligence and his ability to find solutions to almost any problem. They 19 that he had always been like that, and that in normal life, all Reggie needed was a little more time than others to communicate. That was the only 20.

    Visiting Xi'an was once my dream. It became a reality when I was admitted to a training course in China along with two other ladies. Finally, the day arrived I landed at Xianyang International Airport in early August. As soon as I landed, I (feel) a change in the atmosphere. I saw people standing in queues and  (wait) for their turn at the immigration desk. Afterwards, we were transported to the office in the International Exhibition Center. China had invited participants from twenty-three developing (country) to share digital television broadcasting techniques  them.

    In my 20 days in Xi'an, I got the opportunity to observe Chinese Culture  (close), and thus it left an unforgettable mark on me. Now, Xi'an is like my second home. Since I came back to Pakistan, I have been missing Xi'an badly.

    My 20-day stay in Xi'an was great experience. It was a learning opportunity, and also a chance to (broad) my understanding of diversity. I learned that despite differences of colors, heights, races and religions, all human beings (tie) by the bond of humanity, and that the future of nations is global with (develop) and peace.

增加：在缺词处加一个漏字符号(˄)，并在其下面写作该加的词.

删除：把多余的词用斜线(\)划掉.

注意：⒈每处错误及其修改均仅限一词.

⒉只允许修改10处，多者(从第11处起)不计分.

    Yesterday, I read article about the Hongkong-Zhuhai-Macao Bridge, the longer sea-crossing bridge in the world. It's 55 kilometers long, which lifespan(使用寿命) is set at 120 years. And it can stand heavy storm and earthquakes. What's more, the travel time among Hongkong and Zhuhai is cut from 3 hours to just 30 minutes.

    After reading the article, I am wildly excited. In my opinion, drive a car on the bridge was an enjoyable experience. Besides, my dad didn't agree with me, because she was not skillful at switching freely between Chinese driving. Though I can understand him now, but I do hope someday we can drive on the bridge.

⒈你喜欢的音乐；

⒉你对音乐的看法.

注意：⒈词数100词左右；

⒉可适当增加细节，以使行文连贯.

Dear Alice,

    I'm more than delighted to hear from you.

Yours,

Li Hua