If you receive an invitation, be sure to {#blank#}1{#/blank#}quickly. If you can't go, you should tell the host and give him some{#blank#}2{#/blank#}If you can go, make sure of the place and the{#blank#}3{#/blank#}and make a note of your host's telephone {#blank#}4{#/blank#}Let the host know if you will be a little {#blank#}5{#/blank#}You'd better {#blank#}6{#/blank#}twenty minutes earlier,{#blank#}7{#/blank#}do not stay much late.

    You don't have to {#blank#}8{#/blank#}a gift for your host ,If you would like to {#blank#}9{#/blank#}your host, you can send a note of thanks to your host or{#blank#}10{#/blank#}your host afterward (以后) to express(表达) your thanks .

    There's not just one reason why kids can't fall asleep, though, so there's also more than one{#blank#}1{#/blank#}.

    If there's anything about your room that makes you feel {#blank#}2{#/blank#} at night, like a picture that looks strange in the dark, or a noisy tap that leaks drop after drop, be sure to ask one of your parents if it can be moved or fixed.

    It may not{#blank#}3{#/blank#} make sense why something bothers you, but if it's keeping you from sleeping, it should be changed. Another idea could be getting ready for bed earlier than usual. Try to take more time to {#blank#}4{#/blank#} by taking a warm bath, or listening to a bedtime story at least30 minutes before you want to go to sleep.

    The most difficult thing for university student Shaun Rogers is opening the classroom door by {#blank#}1{#/blank#} . Shaun can't do this without help because he is only six years old. He's the {#blank#}2{#/blank#}person ever to study at Rochester University in New York. Shaun began {#blank#}3{#/blank#} at two and by the age of five he had read many books and was able to finish writing his first book. "I love learning", says Shaun." My hero is the scientist Albert Einstein. He never combed (梳理) his hair or {#blank#}4{#/blank#} socks."

    Shaun's mother first recognize that her son was different when he kept crying at playschool because he was bored with the {#blank#}5{#/blank#} games. She started teaching him at home after finding that local schools {#blank#}6{#/blank#} not prepared for children who learned at Shaun's speed. Now Shaun is studying geography at the university and using the Internet to finish his high school studies. However, some scientists {#blank#}7{#/blank#} that too much study can stop a child from developing {#blank#}8{#/blank#} . "I don't care how clever the kid is. A six-year-old boy has to play with their friends," says Dr. Brain Wood. Mrs. Rogers disagreed that all her son's time was {#blank#}9{#/blank#} up by schoolwork. "He loves playing the violin and has many{#blank#}10{#/blank#} such as camping, fishing and swimming, just like other boys of his age."

    Do animals have their culture? What do we mean by "culture"? Recent years social scientists have begun to ask if culture is found just in humans, or if some animals have their culture too. When we think of culture, we mean a way of life that a group of people have in common(共同的). Culture is the {#blank#}1{#/blank#} and beliefs(信仰) that a country or a group has. It is the way of behaviour that helps people live together. It is also the way of behaviour that makes a group of people {#blank#}2{#/blank#} other groups.

    Our culture makes us lose strength, claws(爪子), long teeth, and other defenses (防卫). Instead we use tools, cooperate(合作) with {#blank#}3{#/blank#}, and communicate with language. But this kind of "culture" can also be found in the lives of some animals. Animals can also make tools, for example. We {#blank#}4{#/blank#} think that the ability to use tools was the dividing line(分界线) between human beings and other animals. However, we have found that is not like this. Some animals can not only use tools but also make tools themselves. Animals can also share knowledge with each other and use their own language to communicate. So it may be important for us to know that the line dividing us from animals is not as clear as we used to think.