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    Driverless(无人驾驶的)technology is quickly progressing with many cars being tested on roads around the world．Now, researchers in Singapore are testing a self-driving scooter，which has four wheels and a seat．It can move at a speed of up to six kilometers an hour．Researchers said the scooter was built with materials that did not cost much money．

    The scooter was developed by the National University of Singapore．Researchers at the Massachusetts Institute of Technology(MIT)also took part in the project．It was designed(设计)for people who cannot，should not or do not want to drive a car．It could help older adults，the disabled or people who are too young to drive．

Marcelo Ang，a researcher at the National University of Singapore，says the scooter can be especially useful for people who use wireless devices(无线设备)while walking on city streets，because there is a sensors(探测器)in it． “I'm sure you have experienced people who almost run into you while using their phones on the street．Would it be so nice to drive the scooter without worrying about the safety?”he says．Besides，developers of the scooter say it can work together with ride—sharing services to make trips completely easy and safe．

The researchers hope the scooter will reduce the need for cars，which can lower pollution and reduce accidents．

    Marcelo Ang says the scooter has completed many successful tests at the university．Kevin Xiangyu Hui，a university student．tested the scooter and said he found the ride was very smooth and safe．“When I sat on this machine．I felt really relaxed and it was really cool．”The scooter has yet to complete lots of road tests so it is not available to buy at present．

    "Mirror (镜子) mirror on the wall, what film is on in the cinema?"

Now with this kind of new mirror, you can brush your teeth and read news at the same time in your bathroom. Now not many people have this kind of mirror, but it will be popular very soon.

    The mirror works with new software(软件). You can use it to get news. You can also make your time table on it. It can also tell you what to wear because it knows the weather. The mirror is very clever. You can write notes on it for family members.

    There's another kind of new mirror, too. It can get much information from the user's clothes. It tells the users what clothes make him or her look good. Going shopping or eating out? Wait a minute! The mirror can give you some coupons(优惠券), too.

Barry and Ann are twins(双胞胎), but they like different sports. Barry like soccer. He is in the school soccer club,and he plays soccer every day. He has nine soccer balls in his bookcase. He always likes volleyball. He has two white volleyballs and two blue volleyballs. But Ann doesn't like soccer or volleyball. She likes tennis. Tennis is interesting. She is in the school tennis club and she plays tennis every day. She has  seven tennis balls and two  tennis  rackets in her room. She also likes baseball. She has five baseballs—two green baseballs and three yellow baseballs.

Dick didn't spend the money he made on games or snacks, he has s{#blank#}1{#/blank#} up money for the last two years so he could buy his friend Brandon a new electric wheelchairs (电动轮椅). 

Dick and Brandon have been friends {#blank#}2{#/blank#} years. Though both of them go to Caddo Hills High School, Brandon has a h{#blank#}3{#/blank#} time getting through the hallways. Because Brandon uses a push wheelchair to get from class to class, he says his arms start to h{#blank#}4{#/blank#} after using it for so long. 

Dick spent the last two years t{#blank#}5{#/blank#} (take) a part-time job at a car repairing shop. He really wanted to buy Brandon an electric wheelchair. Dick f{#blank#}6{#/blank#} (final) could buy the wheelchair last month, and when he brought it to Brandon in class last month, Brandon could hardly hold back his feelings. He said, "I was just crying everywhere. I can't b{#blank#}7{#/blank#} he did that for me."

"Tt's been my d{#blank#}8{#/blank#} to have one of these," Brandon a{#blank#}9{#/blank#} "and now it came true."

"Dick has had some bad experiences over the last year, so being able to help somebody else has really brought him out-being able to know that he made a {#blank#}10{#/blank#} (different)," Calleen said. 

When Grace Berbig was 7 years old, her mom became ill. Every day, Grace and her two younger sisters would write letters 1 of messages of love. These letters brought joy to their mom.2 their mother passed away three years later. After that, their father often reminded them that3 was a choice, and that it was their job to turn the heartbreaking(令人心碎的) event into4 positive(积极的). 

When Grace got into high school, she5 many organizations to offer help to others, but she6 felt like she was doing enough. "I want to7 a special way for people to help. Everyone can be a part of it, no matter 8 they have money or not. "

In October, 2018, Grace9 a club named Letters of Love at her high school to support children in fighting serious illnesses 10 letter-writing and craft-making. 

To her surprise, more than 100 students11 at the first club meeting. Letters of Love grew so fast that Grace had to raise money online to help cover the 12 of craft-making materials the next year. 

Now, Letters of Love has grown to more than 25 13 with over 1, 000 members. They 14 support for more than 60, 000 patients in children's hospitals around the world. 

Grace took a gap year(间隔年)before she started college so that she could focus on Letters of Love and15 other projects, including publishing a children's book. 

"The goal of the book is to tell children that they are never too young to change the world, "Grace said. 

Ye Lianping is a 96- year- old re tired teacher from a village in Anhui Province. He has been teaching left- behind children there for free during the past 24 years. 

Teaching has always been an important part of Ye's life. After he retired, he began offering free English- language classes to left- behind children. He first set up a classroom in his own house. Later, with the help of the government, he got another two classrooms. To provide education for more children, he also set up the Ye Lianping Scholarship Fund with almost all his money and the donations（捐赠物） from others. So far, it has helped hundreds of left- behind children. 

Ye is quite generous（慷慨的） to these children, but he spends very little money on himself. He lives a very simple life. He lives with his wife in a house built over 30 years ago. He never buys any drinks. And he has been wearing the same jacket for over 40 years. 

Although he is getting older, Ye is never tired of teaching. In 2018, he got hurt while riding a bicycle to buy vegetables. Instead of resting in bed for recovery, he quickly returned to class with a walking stick. 

Ye is racing against time to spend as much time as possible on left- behind children's education. People call him "the candlelight of the village". But he said, "I'm just a firefly（萤火虫）, muking little light, not as much light as a candlelight can give. "