On the {#blank#}1{#/blank#} (one) day of the new term, I met my new headmaster at the school gate. "Follow me, please!" he said. He had {#blank#}2{#/blank#} quiet, kind voice. He took me into my new classroom and {#blank#}3{#/blank#} (leave). In front of me, thirty pairs of eyes looked at me. I knew he had told the students that I was blind. I could almost feel the question behind their eyes: "Blind?" I felt the answer too: "If she's blind, this should be good!" I heard quiet {#blank#}4{#/blank#} (voice) in a corner of the classroom. For a moment, I felt afraid. I knew at once that I had to be {#blank#}5{#/blank#} (strong) than before.

    "Class," I said as {#blank#}6{#/blank#} (loud) as I could. "I may be blind. But I am not foolish. Take those naughty smiles off your faces, and stop talking, please!" Of course, I could not see their faces; I just guessed that some of them were smiling. The class were quiet. They were very surprised. I knew that I had done the right thing.

    {#blank#}7{#/blank#} the days went by, the students had more surprises. I could smell when the children were eating sweets. I could easily hear combs going through hair, students {#blank#}8{#/blank#} (pass) messages, and so on. Once I found a girl passing a message to a friend. I took the message to the teachers' room. A teacher read it to me. On one side it said, "Do you think she can see?" On the other it said, "I think so. She always knows {#blank#}9{#/blank#} we're doing."

    Soon the students stopped being naughty, and started to work hard. Before long, they brought in photos of {#blank#}10{#/blank#} (they) families for me to look at. I knew then they were my friends. I also knew they had forgotten that I could not see.

    In today's world, sleep experts often say that for a better night's rest, Americans should turn {#blank#}1{#/blank#}their smart phones or iPads before sleeping. Such electronic products make the brain more {#blank#}2{#/blank#}(act), and then influence their sleep. But according to a latest survey, more than 90% of Americans regularly use a computer or some other {#blank#}3{#/blank#} (kind) of electronic products in the hour before bed.

    Researchers find that man-made light from some electronic products at night may reduce (减少) the brain chemicals that help {#blank#}4{#/blank#} (sleep). In the study, the researchers let volunteers read, play games and watch movies on a screen for different time while measuring {#blank#}5{#/blank#} much light their eyes received. They found that two hours of {#blank#}6{#/blank#}(sit) before a bright screen at night reduced the sleep chemical levels by about 22%.

    Then the researchers studied the college students {#blank#}7{#/blank#} often used computers at night. They got the {#blank#}8{#/blank#}(similar) results. And researchers say that may not only cause sleeplessness, but also {#blank#}9{#/blank#}(raise) the risk of obesity（肥胖症）, diabetes（糖尿病）and other diseases.

    To be on the safe side, the researchers suggest that we should use computers {#blank#}10{#/blank#}(little) than before, or turn down our screens as much as possible before sleeping.

    My sister went to see a doctor last week. She supposed she {#blank#}1{#/blank#}(have) some health problems. Her first problem was that she often had back pain {#blank#}2{#/blank#}she always had to sit for a long time to work in her office. The pain almost drove {#blank#}3{#/blank#}(she) mad because she couldn't pay attention to work. The doctor suggested that she should stand up and watch outside after {#blank#}4{#/blank#}(sit) for two hours. She could also do some sports like climbing stairs. The {#blank#}5{#/blank#} (two) problem was that her eyes often felt tired and uncomfortable. This brought much trouble {#blank#}6{#/blank#}her. The reason was that she often used her mobile phone {#blank#}7{#/blank#}the light off at night. The doctor said it was actually {#blank#}8{#/blank#}(harm) to people's eyes. If she wanted to use her mobile phone at night, she must keep the light {#blank#}9{#/blank#}, or the light of the mobile phone may hurt her eyes. Her last problem was she had a stomachache because she didn't eat anything for supper. She was on a diet. The doctor said the idea was {#blank#}10{#/blank#}(fool). She could have anything for supper but she could have it three hours before she went to bed.