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#}, and then influence their sleep. But according to a latest survey, more than 90% of Americans often use a computer or some other {#blank#}3{#/blank#}of electronic products in the hour before bed.

    Researchers find that man - made light from some electronic products at night may reduce the brain chemicals that help {#blank#}4{#/blank#}. 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#} 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#} results. And researchers say that may not only cause sleeplessness, but also {#blank#}9{#/blank#} 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#} than before, or turn down our screens as much as possible before sleeping.

    A Christmas Carol is a famous novel written by Charles Dickens. It{#blank#}1{#/blank#}us the true meaning of Christmas：the importance of sharing and giving love and joy to people around us.

    The story is about an old marl named Scrooge who never laughs or smiles He is mean and only thinks about{#blank#}2{#/blank#}, and doesn't treat others nicely. He just cares about whether he can make more money. And be hates Christmas. One Christmas Eve, Scrooge sees Marley. Marley used to be just like Scrooge, so he was punished after he{#blank#}3{#/blank#}. That night, three spirits visit Scrooge. They take him to see his happier childhood, how{#blank#}4{#/blank#}others arc spending Christmas this year and his sad future.

Scrooge is so scared that he wakes up and finds out it is already the next morning—-Christmas Day! He changes his life and becomes a better person. He now treats everyone with kindness and{#blank#}5{#/blank#}, spreading love and joy everywhere he goes. And that is the true meaning of Christmas!

      Bob was only seven years old. One night Bob was at home {#blank#}1{#/blank#} while his parents were out for a party. He had often stayed alone before, so he wasn't afraid. As he waited for his parents to {#blank#}2{#/blank#} home, he watched a film on TV. His eyes became heavier and heavier as time {#blank#}3{#/blank#} by.

      Suddenly Bob's eyes opened wide-what was the {#blank#}4{#/blank#} in the next room? Bob heard the window being opened slowly. For a minute, Bob was so {#blank#}5{#/blank#} that he could not move, and his body felt like ice. He knew that he couldn't lose his head (惊慌失措) and began to think of the things he could do. Again he heard the sound of someone trying to climb into his home {#blank#}6{#/blank#} the window.

      Bob's drums were standing in the corner near the TV. "Wait, {#blank#}7{#/blank#} there is something I can do," thought Bob. He {#blank#}8{#/blank#} on his drums as hard as he could. The sound was so terrible that Bob {#blank#}9{#/blank#} even himself. He also surprised the man in the window, who {#blank#}10{#/blank#} away as fast as possible. How clever he was!