Are you a man or a mouse? When {#blank#}1{#/blank#} (ask) this question, people want to know {#blank#}2{#/blank#} you think you are a brave person or a coward. But you will never really know the answer to this question until you {#blank#}3{#/blank#} (test) in real life. Some people think they are brave but when they come face to face with real danger, they act like cowards. {#blank#}4{#/blank#} think of themselves as cowards, but when they meet danger, they act like {#blank#}5{#/blank#} (hero).

    When you are in a very dangerous situation and feel afraid, the body automatically produces a chemical {#blank#}6{#/blank#} (call) adrenalin (肾上腺素) in the blood. With adrenalin in the blood system, you feel {#blank#}7{#/blank#} (strong) than ever before. {#blank#}8{#/blank#}, when you are absolutely {#blank#}9{#/blank#} (terrify), the body can produce too much adrenalin, {#blank#}10{#/blank#} makes you find you can't do anything at all.

    Letters as a way of communication have long given way to phone calls and WeChat messages. But a TV show, Letters Alive, is helping bring this old way to keep in touch back{#blank#}1{#/blank#}the present.

    Letters Alive took{#blank#}2{#/blank#}(it) idea from a UK program, Letters Live, released in 2013. Both{#blank#}3{#/blank#}(show) feature famous actors and actresses, but there{#blank#}4{#/blank#}(be) no eye－catching visual effects or any regular showbiz(娱乐圈) activities. Instead, it's just a live event{#blank#}5{#/blank#}remarkable letters selected from a wide time span and a diverse range of subjects are read. There is, for example, a passionate letter from Huang Yongyu to playwright Cao Yu 30 years ago to criticize his lack of {#blank#}6{#/blank#}(create).

    Every letter is like a small piece of history. By hearing them{#blank#}7{#/blank#}(read), it's as if we are being sent back in time to experience a moment that we would otherwise never have had the chance to.

    Compared to{#blank#}8{#/blank#}(publish) texts, letters also{#blank#}9{#/blank#}(natural) come with a personal touch. As well as celebrating the pain, joy, wisdom and humor, Letters Alive  {#blank#}10{#/blank#}(commit) to promoting Chinese literature since first run.

    Scientists found that air pollution may be responsible {#blank#}1{#/blank#} a significant reduction in intelligence. The research conducted by the World Health Organization (WHO) in China {#blank#}2{#/blank#} (show) that air pollution led to big falls in test {#blank#}3{#/blank#} (score) for languages and arithmetic. The study is called "The impact of exposure to air pollution on cognitive (认知的)performance ". It was published in the Proceedings of the National Academy of Sciences journal. The study took place over four years. Researchers analyzed speaking and arithmetic tests taken by 20 000 people of all ages. They said, "Polluted air may prevent cognitive ability {#blank#}4{#/blank#} people become older.”

    The study is a warning to the rest of the world, {#blank#}5{#/blank#} (especial) to those in cities. Over 91 percent of the world population live in areas with {#blank#}6{#/blank#} (poison) air and air pollution is the {#blank#}7{#/blank#} (four) highest cause of global deaths. Researchers discovered that {#blank#}8{#/blank#} longer people were exposed to polluted air, the greater their intelligence went down. They said air pollution caused a year's worth of lost education. For those {#blank#}9{#/blank#} were over 60 years old, this could be several years. A researcher warned, "There is no shortcut {#blank#}10{#/blank#} (solve) this issue. Governments really need to take effective measures to reduce air pollution."

    Yesterday I went shopping in the town. I was using my crutches(拐杖)on {#blank#}1{#/blank#} were two bags. I really struggled through the shopping mall. I was {#blank#}2{#/blank#}(tire)! After a while, I found a space and had {#blank#}3{#/blank#} rest there.

    Then I noticed Michael. He was my former student and he was a man {#blank#}4{#/blank#} his 40s. It's been years since I {#blank#}5{#/blank#}(teach) Michael, but he stopped to chat with me. When he noticed my crutches, he said, "Let me carry the bags for you." I thanked him but {#blank#}6{#/blank#}(polite) declined his offer. Then Michael pointed to a coffee shop nearby, "I will be here Rose Marie, if you change your mind." It was lovely and kind of {#blank#}7{#/blank#}(he) to give me an opportunity to change my mind.

    In fact, Michael is tattooed(纹身) on his arms. People think that guys like this are frightening, but there {#blank#}8{#/blank#}(be) nothing threatening about Michael. Michael's {#blank#}9{#/blank#}(appear) with tattoos is just his idea of sell-expression.

    {#blank#}10{#/blank#}(chat) with him helps me recognize the tenderness in the youth regardless of how they look.