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.

    Last weekend, we went to the countryside to have a picnic. We made some sandwiches to take {#blank#}1{#/blank#} us for lunch. We left quite early and there was not too much traffic at that time. After about two hours, we came to a nice {#blank#}2{#/blank#}. The water was very clear. After a swim, we had lunch under the trees. Then we went for a walk.

    We saw some {#blank#}3{#/blank#} birds and butterflies. After walking for an hour, we returned to our {#blank#}4{#/blank#} and began to drive home.

We got home very late and we were {#blank#}5{#/blank#}. But we enjoyed ourselves very much.

    One sunny afternoon, a young deer and an old deer were {#blank#}1{#/blank#} under a tree in the forest. Suddenly, in the distance, they {#blank#}2{#/blank#} some sounds of dogs' barking.

    The old deer stood up quickly. He felt nervous and {#blank#}3{#/blank#}. He said to the young deer, "Be quick! It's time to find a place to hide in. The barking dogs are fierce(凶猛的) and they will {#blank#}4{#/blank#} us."

    The young deer laughed and said, "Why should we hide from the dogs? We are bigger and

    {#blank#}5{#/blank#}than them. We can toss(扔)them aside with our big antlers(角). We should fight with them bravely. "

    The old deer admired the {#blank#}6{#/blank#}of the young deer, but he did not believe the young. "We'd better run away now." said the old deer.

    The young deer refused to run away. He decided to fight {#blank#}7{#/blank#} the dogs. As the dogs ran to {#blank#}8{#/blank#}, he put down his antlers and wanted to toss them aside. But he didn't win the {#blank#}9{#/blank#} because there were too many dogs. He was killed by the dogs in the end.

    The young deer lost his life because he didn't know his strength and weakness. We can learn a lesson from the story. Don't be like the {#blank#}10{#/blank#} young deer when we are in danger. We should know our strength and weakness.

    Last night, Dave met Tina. They {#blank#}1{#/blank#}about their last weekend. For Dave, the {#blank#}2{#/blank#} was very nice. On Saturday, he{#blank#}3{#/blank#}for the history test. On Sunday, he watched a (an) {#blank#}4{#/blank#} TV play. "It was great!" he said. {#blank#}5{#/blank#}Tina's weekend wasn't very good. She was really   tired because she had a {#blank#}6{#/blank#} weekend. She went shopping on Saturday morning and read a book {#blank#}7{#/blank#} music on Saturday afternoon. She visited {#blank#}8{#/blank#} grandmother on Saturday evening. On Sunday, she wrote {#blank#}9{#/blank#} new song for the school music festival. It was a little {#blank#}10{#/blank#}, so she asked her mother for help.