Unit 8 第6课时 Section B (3a-Self Check)-【精彩练习】2024-2025学年九年级全一册英语同步评价作业教师用书配套Word（人教版）

第六课时　Section B (3a—Self Check) 一、阅读理解 Zebras come from Africa. They can be seen in almost all the zoos around the world. Many people like them because of their black and white stripes(条纹). For a long time, scientists have been trying to find out why zebras have stripes and the use of these black and white stripes. But no one can give an exact answer. The early scientists thought these black and white stripes could help them avoid being caught and eaten by tigers, lions and other animals. Because as they run, it's difficult for other animals to estimate(估计) their speed and direction. But is it true? Scientists from England have been taking a much closer look. They have been testing the idea using a game called Dazzle Bug. That's where you have to catch a bug, but it keeps changing its pattern(图案) in an effort to stop you doing so. What the scientists have found is that even when they are moving, the bugs still lose their clear patterns. So scientists believe that how zebras protect themselves while moving may depend on a completely different mechanism(机制). No one knows how to explain the stripes on a zebra. But while the results may raise more questions than they answer, it does tell the idea that even__for__scientists,__nature__is__a__moving__goal． (　B　)1．What do scientists want to know? A．Zebras' living conditions. 　　　B．The mystery behind zebras' stripes. C．The best ways to protect zebras. 　　　D．Zebras' living habits. (　A　)2．Which of the following is the early scientists' idea? A．Stripes can protect zebras. 　　　B．Stripes can help zebras run faster. C．Stripes can help zebras estimate directions. 　　　D．It's difficult for zebras to lose stripes. (　C　)3．What's the result of the test that scientists in England have taken? A．The bugs can lose their patterns but zebras can't. B．The bugs can avoid being caught while moving. C．The early scientists' idea may be wrong. D．The stripes can help zebras run away easily. (　D　)4．What does the underlined sentence in the last paragraph mean? A．Scientists can know more about nature as it is changing. B．Scientists are good at studying moving things in nature. C．It's easier for scientists to know more about nature. D．Even for scientists, nature is always full of mysteries. 二、单元写作指导 写前任务 任务一： 根据短文内容，选择合适的词(might、could、can't)填入横线处。 Who Cleaned the Classroom? I am on duty today. So I went to school earlier than before to clean the classroom. But to my surprise, the classroom was very clean. Someone had cleaned it. We guessed who did it. It 1．__might/could__ be Lin Xiao. He is warm－hearted, and always helps the classmates. But I didn't see him this morning. Someone told me that he was ill at home today. So it 2．__can't__ be him. Some students guessed it 3．__might/could__ be Wang Tao. He is my best friend, and he 4．__might__ help me clean the classroom. I asked him before class. He said he didn't do that. Some students thought it 5．__could/might__ be Zhang Liang because he is always the first one to get to the classroom. But he said he didn't do that. I felt confused. The story turned out to be a surprise. In the first class, our head teacher told us that Wang Kai went to another city because his father got a new job there. He was so sad that he didn't tell any student that he would leave. He loved the class very much, so he decided to clean the classroom for the last time. 任务二： 任务一中填入的情态动词都用来表示__猜测/推断__。 写作思考 1．这篇短文以什么时态为主？ __一般过去时。__ 2．根据短文内容，将句子补充完整，体会支撑理由的合理性。 (1)It might be Lin Xiao. He is __warm－hearted__and__always__helps__others__． (2)It can't be Lin Xiao. He was __ill__at__home__today__． (3)It might be Wang Tao. He is __my__best__friend__and__he__might__help__me__clean__the__classroom__． (4)It could be Zhang Liang. He is __always__the__first__one__to__get__to__the__classroom__． 3．看下面的写作结构图，有什么地方值得你借鉴吗？ 4．单元话题相关谚语。 (1)Mystery creates wonder and wonder is the basis of man's desire to understand. 神秘创造奇迹，而奇迹是人类渴望了解的基础。 (2)The most beautiful thing we can experience is mysterious. 神秘的事物是我们能体验的最美丽的东西。 写作实践 假如你在学校操场上捡到了一件红色夹克衫，它的主人会是谁呢？请你根据表格提示以及你的猜测写一篇80—100词的英语短文。 Lily 不喜欢穿夹克衫 Ann 不喜欢红色 Mary …… Carol …… Jane 夹克衫上有“Jane”的字样 　　注意：恰当运用本单元所学语法：情态动词表示推断。 　I found a red jacket on the school playground. Let's find out whom it belongs to. First of all, I think it can't be Lily's because she doesn't like wearing jackets. She likes wearing dresses. It can't belong to Ann either because she doesn't like the color red. And it can't be Mary's because it's much too big for her. She is thin and short． Who might it belong to then? It might be Carol's because she was playing volleyball with her friends on the playground. Oh, Jane's name is on the jacket. And red is her favorite color. The jacket must be hers. Let's go and find Jane. She must be in the classroom now.　 温馨提示：本单元基础题补充详见《单元夯基》单本。　 学科网（北京）股份有限公司 $$