题型:阅读理解 题类:常考题 难易度:困难
外研版初中英语七年级下册精彩练习专题训练专题四阅读理解
What is the firstthing you want to do when you see someone yawn(打呵欠)?You want to yawn, too! Yawning iscontagious.
Scientists have foundthat all people yawn. Babies start to yawn even before they are born. When ababy is inside its mother, he or she yawns. When young children are about oneyear old, they start to yawn when they see others yawning. That's why scientiststhink yawning is contagious.
But why do we yawn?Well, scientists are not really sure. Some think we yawn because we feel bored.Others believe yawning has something to do with breathing. When there is toomuch carbon dioxide (CO2) in our bodies. our bodies will tell the brains(大脑)to breathe deeply. That causes a big yawn.In 2007, scientists said people yawned to cooldown their brains. Thesescientists found people yawned more often if they were warmer than others.
Scientists are tryingto find out why yawning happens and why it is so contagious. But they are onlysure that when one person yawns. everyone else nearby wants to yawn, too.
①People yawn because they are bored.
②People yawn to make them look funny.
③People yawn to cool down their brains.
④People yawn to cut down carbon dioxide in their bodies.
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My name is Peter and I am a 12-year-old boy. This year, I have a new friend. {#blank#}1{#/blank#} name is Tom. He {#blank#}2{#/blank#} from Guangdong Province. But now he is {#blank#}3{#/blank#} in Beijing with his parents. Tom is a lovely boy with black glasses. He is 13 years old, so he is one year {#blank#}4{#/blank#} than me. We often go to school together. We are in the {#blank#}5{#/blank#} class. He likes {#blank#}6{#/blank#} very much. He has a very large ball collection in his bedroom. There are four tennis balls and 10 basketballs. He {#blank#}7{#/blank#} a lot of books about sports, too. He likes all his books and balls, {#blank#}8{#/blank#} he doesn't play sports. He often watches ball games and sports shows on TV. And I often go to Tom's {#blank#}9{#/blank#} and watch the ball games together. Now, we are watching an exciting football match {#blank#}10{#/blank#} . We have a good time!
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