发布时间 : 星期一 文章2017-2018学年北京市海淀区八年级(下)期末英语试卷附答案解析更新完毕开始阅读
are small， which helps them hide easily． Many frogs have coloring that allows them to hide in their environment， making it difficult for predators to find them． In addition， most frogs are active at night． So it is difficult for most animals to see them in the dark．
Small but LoudFrogs call to tell other frogs where they are． Their voices can be very loud． But when frogs feel the footsteps of a larger animal， they become silent．
Many of the world's frogs live in rain forests， where there are many different animals calling to their own species （物种） in their own ways． Frogs need to call loudly enough to be heard through the noise in order to find other frogs．
Singing with PurposePeter Narins is a scientist who studies how frogs call to one another． He has learned that frogs use their calls to help them tell friend from enemy． They sing the same notes at the same volume （音量） each time they call． In addition， Narins has found that frogs of the same species always sing the same patterns （模式）． These patterns are like a code that is different from other animals' calls and difficult for others to copy． Narins also observed that timing plays a role in frog calls． Many frogs call only at a certain time of night．
More Work to DoScientists want to better understand the purpose of frog calls． Studies continue to explore the details of frogs' unique communication． Being heard but not seen is one way frogs stay safe． The idea that they have found a way to survive in a dangerous world is simply amazing．
32. Frogs are good at being heard but not seen because ______
A. they can not jump high B. they can hide easily C. they are not active enough D. they have bright colors 33. Frogs need to call loudly to ______
A. drive away other species
B. tell friend from enemy quickly C. be heard by other frogs
D. feel the footsteps of a larger animal
34. What can we learn from the passage？ ______
A. Frogs always sing the same notes at different volumes． B. Frogs stay safe in a dangerous world only by their calls． C. Some frogs call accidentally at different times of night． D. Some details of frogs' communication still leave unknown．
35. Which is probably the best title of the passage？ ______
A. Frog Songs
B. Life of Frogs C Frog Secrets D． World of Frogs 四、任务型阅读-简答（本大题共1小题，共10.0分）
36. Sometimes the world may feel like an unhappy place． However．you can make a
difference． If you make even a person smile today， you can help make this world a better place． Here is a list of ideas to help you．
Send a handwritten letter In this age where everything is sent by email， it is a shock to receive a letter through the post． Writing a few words on paper to a friend is an easy way to make one smile． Even a postcard with a couple of sentences could really make someone's day- all for the price of a stamp！ Volunteer
Volunteering is one of the nicest things you can do． It requires （需要） some time and research to find the perfect project before volunteering． Whether you volunteer at your local youth group or take dogs from the shelters for a walk， the simple fact that you are giving up your time to help someone else is unbelievable． There are so many chances，
第5页，共16页
so you are sure to find one that is right for you． And it doesn't necessarily have to take up all your time-it could be once a week or a couple of times a year．
Make something for a special personWhether you're creative or not， taking time to make something for someone else shows how much you appreciate them． Even if you （感激）think you are not creative，the receiver will feel lucky to get such a special gift that you put your time into． Some ideas could include a card， painting， drawing， song， poem or cake!
Tell someone \． You don't even have to say \． Perhaps you can tell a friend that you appreciate all they are to you， or remind your mum that you love her． Sometimes， in our busy lives， we forget to take a moment to tell people what they mean to us．
Is writing a few words on paper an easy way to make a friend smile？ ______ What does it require to find the perfect project before volunteering？ ______ How will the receiver feel to get a special gift？ ______
What do we sometimes forget to do in our busy lives？ ______ What is the passage mainly about？ ______ 五、书面表达（本大题共1小题，共10.0分）
37. 根据中文和英文提示，完成一篇不少于50词的文段写作．所给提示词语仅供选
用．请不要写出你的校名和姓名．
每学期学校都会组织丰富多彩的出游活动．学校校刊以\…\为题征文，请你根据一次出游活动写一篇短文投稿．请补全题目．谈谈你去了哪里，做了什么以及学到了什么．
提示词语：visit， enjoy， memory， culture，meaningful 提示问题：1．Where did you go on your school trip？ 2． What did you do during the trip？ 3． What do you learn from it？
A School Trip to______
第6页，共16页
答案和解析
1.【答案】B
【解析】
考查物主代词．根据题干My mom is very kind，可知应说我妈妈很好，我非常爱她．这里说的是妈妈，love后接人称的宾格her． 故选：B．
我妈妈很好，我非常爱她．
理解选项的含义，根据My mom is very kind和单词love，结合选项作答． 2.【答案】B
【解析】
分析句子，结合选项，推测意思是早上我们通常有四节课．在早上是固定短语in the morning． 故选：B．
早上我们通常有四节课．
解答这类试题时，务必充分理解上下文的语境和前后文的逻辑关系，找到解题的依据，同时正确区分选项的细微差别，准确作答． 3.【答案】C
【解析】
考查时段．A．How many多少，提问可数名词复数；B．How much多少，提问不可数名词；C．How long多久，提问时间段；D．How often多久一次，提问频度．根据题干I've had it for three years．可知问的是时间段． 故选：C．
你骑那辆自行车多久了？ 我已经骑三年了．
理解四个选项的含义，根据I've had it for three years．结合选项作答． 4.【答案】D
【解析】
第7页，共16页
A必须；B应该；C需要；D可以；根据句意\可以请你关上窗户吗？有点冷．\可知要填\可以\表示有礼貌的请求． 故选：D．
可以请你关上窗户吗？有点冷．
排除比较法．根据上下文意思或时间状语，推断出合适的时态，排除错误的答案，然后再比较剩下的选择项，从而做出正确的答案． 5.【答案】C
【解析】
since自从；before在…之前；as soon as一…就…；so that以便．根据
Don't worry． I will call you I get there，可知别担心，我一到就给你打电话．这里用as soon as． 故选：C．
别担心，我一到就给你打电话．
熟悉从属连词的基本用法，结合题意，给出正确答案． 6.【答案】D
【解析】
从 in the world判断句子使用最高级形式，而最高级前面应该加冠词the． 故选：D．
珠穆朗玛峰海拔8844.43米，是世界上最高的山．
本题考查的是形容词的最高级，根据句意判断最高级的使用是解答本题的关键． 7.【答案】A
【解析】
考查一般过去时．根据题干A few months ago，可知句子是一般过去时，即几个月前，我去了新加坡度假． 故选：A．
几个月前，我去了新加坡度假．
仔细分析句子的结构，掌握一般过去时的用法．
第8页，共16页