“Cool” is a word with many meanings, {#blank#}1{#/blank#} As the world change, the word has many different meanings.
“Cool” can be used to express feelings of interest in almost anything. When you see a famous car on the street, maybe you will say, “It's cool.” {#blank#}2{#/blank#} You can use “cool” instead of many words. {#blank#}3{#/blank#} A teacher asked her students to write about the waterfall(瀑布) they had visited.On one student's paper was just one sentence,“ It's so cool.”{#blank#}4{#/blank#} But the story also shows a scarcity(缺乏) of words. Without “cool”, some people have no words to show the same meaning. {#blank#}5{#/blank#} I can. And I think they are also very cool.

    The table above shows the sleeping patterns (模式) of people doing {#blank#}1{#/blank#} jobs. It is clear that there are big differences among them. For example, students continuously (连续地) sleep for {#blank#}2{#/blank#}each night because they go to school during the day. {#blank#}3{#/blank#} are busy and stressed out, so they only sleep for 6 hours. But they also sleep continuously during the night. Truck drivers sleep 6 hours and doctors sleep the {#blank#}4{#/blank#} hours among the five. However, because of their jobs, they have to divide their bedtime into different periods. Finally, {#blank#}5{#/blank#} mothers sleep when their babies do. They often have to wake up during the night to comfort (安抚) their babies. It is important to consider sleeping patterns when choosing a job.

    It may be difficult to start high school. Thinking about making new friends might make you feel nervous. {#blank#}1{#/blank#} You are going to school with a group of students of your age. Here are several suggestions for you to follow.

    Forget your fear and just talk to someone.

    It's easier said than done. But try to take a deep breath and find your voice. Don't be afraid to approach (接近) people. {#blank#}2{#/blank#} Sit in the middle of the classroom with as many new friends around you as possible.

    {#blank#}3{#/blank#}

    Take part in after-class activities that interest you. Try to make friends in the clubs. If you don't join anything, you will be just going to class and then going home. Being in a club makes you more social.

    Stay clean.

    No one likes a bad smell that could knock someone over. Shower everyday, brush your teeth and wash your hair. {#blank#}4{#/blank#}

    Be respectful (尊重的) of people's differences.

    {#blank#}5{#/blank#} And everyone believes in different things. It is a good thing to have different friends with different opinions because you can each share your own.

    Is sleep important for children? A new study says yes.

    In America, most people don't get enough sleep. Children aged 5 to 12 are advised to sleep 10 to 11 hours every night, but most of them can't sleep that long. A study found that about 41 million American workers got less than six hours of sleep every night. Scientists worry that parents are passing their poor sleeping habits down to their children.

    In the study, Reut Gruber and some other scientists either added or reduced(减少) one hour of sleep for healthy children aged 7 to 11. They watched the children for five nights. They wanted to know if the amount of sleep can affect(影响) a child's behavior.

    Before the study began, students were asked to sleep the same amount of hours as usual. Their teachers were asked to record their behavior. After changing the children's sleep for five nights, the teachers had to record again. According to the two records, scientists found that those who slept one hour less behaved worse than those who slept one hour more. Students with less sleep were more likely(可能的) to feel sad and had more problems paying attention.

    The scientists chose to study children in their homes instead of in a laboratory, because they wanted to find out how everyday changes might affect children's behavior at school. "In the study, nobody became a talent, and nobody became crazy. But small changes in children can really make a big difference," says Gruber.

    When visitors came to see Sherlock Holmes in Baker Street, they often did surprising things. Sometimes they put their heads in their hands and cried. Sometimes they talked and talked, and couldn't stop. And sometimes they just sat there and didn't say a word. But nobody was more surprising than Dr Huxtable.

    He was a large man, tall, well-dressed. He came into the room, walked to one of the big chairs, and suddenly fell into it. He sat there, with his eyes closed, looking pale and ill.

    Holmes looked in the man's pockets-and found a train ticket from Mackleton, in the north of England.

    "Mackleton-that's a long way," said Holmes, "it's not twelve o clock yet, so he probably left home before five o'clock this morning. He was probably hungry."

    After a minute or two, the man began to move, and his eyes opened. A second later, he stood up. His face was now red and unhappy.

    "Mr Holmes, I am so sorry! I forgot to eat or drink anything this morning that's why I felt ill. But I'm better now," said our visitor," and Mr Holmes, come back to Mackleton with me by the next train, please!"

    "I'm sorry, that's not possible," said Holmes," I'm working on two important cases. I cannot leave London at the moment."

    "Important cases!" our visitor cried, "But this case is very important too. You know about the kidnapping of the son of Duke(公爵) of Holdernesse three days ago."

    "What! The Government Minister?" I was shocked.

    "Yes, that's him. And he is one of the greatest men in the country." said Dr Huxtable, "Mr Holmes, the Duke is offering five thousand dollars for news of his son, and another one thousand dollars for the name of the kidnapper."

    "That," said Holmes, "is a most interesting offer." He looked at me, "Watson, I think we are going with Dr Huxtable back to the north of England this afternoon."

    Raising chickens seems a difficult task for teenagers. Grace Goodpasture from Virginia, US, not only raises them but also tries to breed（喂养） the "perfect chicken". And she even won an award for her love of science.

    Grace started breeding chickens in her third grade at Steward school. At first, she worked on some farms for her school project. But later the fourteen-year-old started to have some ideas of her own.

    "Some have thicker eggshells(蛋壳), and they are hearty(健壮的) throughout the winter," said Grace.

    Since then, the young science lover started to try to find the healthiest free-range(散养) chickens. And she ended up breeding a type that now bears her name.

    The National Science Teachers Association (NSTA) gave the 2015 Angela Award to Grace Goodpasture. Her interests don't end with chickens and eggs. She is also into building robots and testing preservatives (防腐剂) in fast foods. In her words, she wants to go to Virginia Tech for poultry (家禽) sciences in the future.