Itzhak Perlman, a famous violinist, came on stage to give a concert. He was stricken with polio（小儿麻痹症）as a child, so getting on stage is no small {#blank#}1{#/blank#} (achieve).

    The audience sat quietly while he made his way across the stage {#blank#}2{#/blank#} his chair and began his play. But this time,{#blank#}3{#/blank#} went wrong. Just as he finished the first part, one of the strings on his violin {#blank#}4{#/blank#}(break). We thought that he would have to stop the concert. But he didn't.{#blank#}5{#/blank#}, he waited a moment, closed his eyes and then signaled the conductor to begin again.

    {#blank#}6{#/blank#}(power) and pure, his performance attracted all the attention.

    Of course, anyone believes {#blank#}7{#/blank#}impossible to play a harmonious work with just three strings. I know that, and you know that, but that night Itzhak Perlman refused {#blank#}8{#/blank#} (know) that.

    When he finished, people rose and cheered.

    {#blank#}9{#/blank#} (smile), he wiped the sweat and said, “You know, sometimes it is the artist's task to find out how much music you can still make with {#blank#}10{#/blank#}you have left.”

    At first glance, SoFi looks exactly like a real fish. But if you look {#blank#}1{#/blank#}(close), it's not hard to spot the truth: SoFi is a robot, or as {#blank#}2{#/blank#} (it)MIT developers call it, “ a soft robotic fish”, according to BBC news.

    SoFi {#blank#}3{#/blank#} swim, turn and change speeds just like a real fish, and more {#blank#}4{#/blank#} (importance), it can take high-resolution photos and videos with a camera {#blank#}5{#/blank#}(build) into its nose. The robot's “ soft artificial muscle” is made of a type of rubber, it has two side fins(鳍)for waving, {#blank#}6{#/blank#} its nose also hides important electrical components(组成部分).

    The team at MIT developed SoFi to swim among real fish to explore where few other robots or humans can, reported the Los Angeles Times. It {#blank#}7{#/blank#}(operate) with a waterproof video game controller by someone {#blank#}8{#/blank#} can be up to 21 meters away.

According to its leading {#blank#}9{#/blank#}(create) Robert Katzschmann, SoFi, pronounced like the girl's name “Sophie”, is an abbreviation(缩写)of soft fish— and was named {#blank#}10{#/blank#} a girl he had a crush(暗恋)on in high school.

    Beijing was once a city of bikes, the capital of a country {#blank#}1{#/blank#} (know) as the Bicycle Kingdom, where cars were reserved for official and political business. {#blank#}2{#/blank#}, decades of remarkable economic growth led to a huge flowing of cars in the city. Owning one became not just a marker of reaching the middle class but also a {#blank#}3{#/blank#} (require) for marriage. As the economy boomed, autos pushed bikes off the roads, {#blank#}4{#/blank#} (create) heavy pollution and miserable traffic.

    Fortunately, now Beijing may be returning to its roots with a modem twist. Thanks to about 20 technology companies, brightly coloured shared bikes{#blank#}5{#/blank#} (flood) Beijing since last year. Many local residents welcome the shared bikes{#blank#}6{#/blank#} the flexibility and freedom they offer. They pick up the bikes and then ride and drop{#blank#}7{#/blank#} off anywhere they like, locking the back wheel, with no need to find a fixed place.

    Analysis in China say there are three factors{#blank#}8{#/blank#} contribute to the sudden increase of bikes: a lot of cash looking for a home, a good idea and government support. “As the city's population grew, traffic jams got{#blank#}9{#/blank#} (bad).” Cai, the Ofo spokeswoman, said, “Shared bikes could solve the 'last mile' problem in{#blank#}10{#/blank#} environmentally friendly way.”