2016高考英语外研版必修3：模块综合检测(四)

　　Ⅰ.语言知识及应用(共两节，满分45分)

　　第一节　完形填空(共15小题；每小题2分，满分30分)

　　阅读下面短文，掌握其大意，然后从1～15各题所给的A、B、C和D项中，选出最佳选项。

　　One bright summer day，a number of little boys and girls were out walking with their teacher.They walked two by two，singing happily.

　　In their walk they came to a __1__ over the river，and they turned to go across it.They had just reached the middle __2__ there came a great shout behind them.The teacher told them to stop，and she __3__ and listened.When she heard the cry “Mad dog！” she __4__ what was happening.Before she could do something she saw the dog running to the bridge.

　　“Children，” said the teacher，“keep __5__ the wall of the bridge.Don’t move or cry.”Then she went and stood before the boys and girls so that the dog would __6__ her first.

　　The animal came，his mouth widely open.The animal ran up __7__，and seemed to be going by，but when he had just passed the __8__，he made a snap (猛咬) at one of the little girls.At this moment，the teacher saw a man running up with a gun to __9__ the dog.The children must be kept __10__ until the man could come up.So she ran to the dog，and put her right hand into the animal’s __11__.When the man came near enough，he shot the animal __12__.

　　The dog had bitten her so __13__ that the brave lady died soon after the doctors came.She had given __14__her own life to save the lives of the children.When people heard of it，they loved her for her bravery.They said，“The __15__ of this brave lady should never be forgotten.”

　　【解题导语】　本文讲述了一位勇敢的女教师为保护学生而被疯狗咬死的动人故事。

　　1．A.gardenB．temple

　　C．village

　　D．bridge

　　解析：选D。考查名词。他们来到一座桥上。

　　2．A.but

　　B．where

　　C．when

　　D．and

　　解析：选C。考查连词。when作并列连词，相当于at that time“就在那时”。

　　3．A.stayed

　　B．stood

　　C．sat

　　D．turned

　　解析：选D。考查动词。喊声从后面传来，她应是转过身来听。

　　4．A.wanted

　　B．thought

　　C．knew

　　D．found

　　解析：选C。考查动词。句意为：她知道出了什么事。

　　5．A.close to

　　B．off

　　C．away from

　　D．out of

　　解析：选A。考查句意理解。根据常识及上下文可知，学生们只有靠近桥栏杆，才能给狗让开一条路，以保护自身安全。

　　6．A.fight

　　B．meet

　　C．eat

　　D．take

　　解析：选B。考查动词。根据上下文，老师站在孩子们面前目的是让疯狗先接触她。

　　7．A.quickly

　　B．carefully

　　C．silently

　　D．slowly

　　解析：选A。考查上下文理解。根据常识及上下文可知，一只疯狗，后有追赶，不可能是“小心地”、“默默地”或“慢慢地”，而是“很快地”。

　　8．A.girls

　　B．boys

　　C．bridge

　　D．teacher

　　解析：选D。考查名词。因为老师站在前面，应该从老师旁经过。上文说They had just reached the middle...，可排除C。如果从学生旁边经过了，就不可能有下文了，可排除A、B。

　　9．A.beat

　　B．shoot

　　C．strike

　　D．drive

　　解析：选B。考查动词。根据上下文及常识，拿着枪追赶疯狗，当然是为了射死它。

　　10．A.happy

　　B．safe

　　C．alive

　　D．silent

　　解析：选B。考查形容词。老师的行为是为了保证学生的安全。

　　11．A.ears

　　B．lips

　　C．mouth

　　D．breast

　　解析：选C。考查名词。老师为了不让疯狗再咬学生，不惜把自己的手伸进疯狗的嘴里，多么勇敢伟大的女性！下段第一句也说明了此意。

　　12．A.over

　　B．away

　　C．dead

　　D．down

　　解析：选C。考查句意理解。根据上下文。疯狗被打中，应被打死。

　　13．A.deeply

　　B．seriously

　　C．painfully

　　D．quickly

　　解析：选B。考查句意理解。这位勇敢的女教师很快死了，因为咬伤太重了，选项A、C、D不合句意。

　　14．A.out

　　B．off

　　C．up

　　D．onto

　　解析：选C。考查短语动词。老师献出了她的生命。give up为固定搭配，意思为“放弃”。

　　15．A.idea

　　B．hope

　　C．deed

　　D．news

　　解析：选C。考查名词。这位勇敢女性的事迹永远不会被忘记。选项A、B、D均与上下文不符。

　　第二节　语法填空(共10小题；每小题1.5分，满分15分)

　　阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。

　　As 16.________ Irish government tries to cut down the budget of the country’s public finances，schools in this country are suffering from the funding cutbacks.

　　A school in Cork，17.________ lavatory paper(厕纸)used to be offered for free，declared itself short 18.________ cash and asked its pupils to bring their own toilet rolls to school.Parents 19.________ children at St John’s Girls’ national school in County Cork received the request last week.

　　The school’s principal，Catherine O’Neill，wrote to a girl’s parent：“Dear

　　parent，20.________ it

　　sounds

　　a

　　little unacceptable，we have to request your daughter 21.________ (bring) a toilet roll to her teacher.These rolls will be specifically for your daughter’s class and should be given out by the teacher.We also have another request 22.________ your daughter should have tissues (纸巾) in her bag at all times.”

　　Ireland’s public finances 23.________ (become) worse and worse since the economic downturn happened，and education has not escaped cuts in funding.Like this school，most of the measures 24.________ (take) in the educational system were due to the cutbacks.They are trying hard to reduce all kinds of 25.________ (expend) and ensure the educational needs.

　　16．解析：由于此处特指爱尔兰政府，故填定冠词the。

　　答案： the

　　17．解析：where引导非限制性定语从句。先行词是A school，关系词在定语从句中充当地点状语，故填where。

　　答案：where

　　18．解析：本空需要填介词of，和前面的short搭配，表示“缺少……”。

　　答案：of

　　19．解析：此处是指有孩子在这所学校读书的家长，故填介词with。

　　答案：with

　　20．解析：通过对句子逻辑含义分析可知，这个句子与后面的句子是转折关系，故填连词though或者although。

　　答案：though/although

　　21．解析：此处指要求学生带纸巾。根据request sb.to do sth.的固定表达可知，此处应填to bring。

　　答案：to bring

　　22．解析：根据句子语法结构分析可知，that引导同位语从句，解释说明another request。

　　答案：that

　　23．解析：根据句子语法结构分析可知，此处需要填谓语动词。根据句中的since可判断，此处应用现在完成时。

　　答案：have become

　　24．解析：根据句子语法结构分析可知，此处需要填过去分词，充当后置定语，修饰the measures。

　　答案：taken

　　25．解析：根据空格的位置以及句子逻辑含义可知，此处需要填提示词的名词复数形式，故填expenses。

　　答案：expenses

　　Ⅱ.阅读(共两节，满分50分)

　　第一节　阅读理解(共20小题；每小题2分，满分40分)

　　阅读下列短文，从每题所给的A、B、C和D项中，选出最佳选项。

　　A

　　Have you noticed that in any large group，one person seems to be the boss? This is true for wild horses，too.The boss of a herd of wild horses is a stallion (种马)．Stallions are grown male horses.

　　The stallion’s job is important.He watches out for danger.If a bear or other animal comes close，he lets out a warning cry.This helps keep the other horses safe.Sometimes they all run away together.Other times，the stallion protects the other horses.He shows his teeth and rises up on his back legs.Often，he scares the other animals away.Then the horses can safely continue eating grass.

　　Much of the grass on the prairies

　　(大草原)

　　is gone now.Wild horses must move around a lot to find new grass.They spend about half their time eating and looking for food.If they cannot find prairie grass，wild horses will eat tree bark (树皮)．They will eat flowers.If they can’t find these either，wild horses will eat anything that grows!

　　Wild horses also need plenty of water.It is often hot in the places where they travel.At least twice a day，they find streams and take long，long drinks.Like people，wild horses lose water when they sweat.They run and sweat a lot in hot water.To survive，they need as much water as they can get.

　　Wild horses also use water another way.When they find deep water，they walk through it.It feels good! It cools their skin.

　　Now，most wild horses live away from people in the distant plains and mountains；they are safer there.

　　【解题导语】　本文主要讲述了野马的生活习性。

　　26．The passage mainly talks about ________.

　　A．the enemies of wild horses

　　B．the living habits of wild horses

　　C．the boss of a group of wild horses

　　D．the habitat of wild horses

　　解析：选B。主旨大意题。本文主要讲述野马的生活习性，包括种马的作用、觅食等。

　　27．What is the second paragraph mainly about?

　　A．How stallions protect other wild horses.

　　B．When stallion let out a warning cry.

　　C．What stallions do in a herd.

　　D．How wild horses keep safe.

　　解析：选C。段落大意题。文章第二段主要讲述了种马在马群中的主要职责，故C为正确答案。

　　28．Which of the following is TRUE about the stallion?

　　A．He is responsible for the safety of the group.

　　B．He is the oldest horse in the group.

　　C．He is the strongest horse in the group.

　　D．He finds prairie grass for the group.

　　解析：选A。细节理解题。根据短文第二段可知应选A项。

　　29．Why do wild horses move around so much?

　　A．To look for water.

　　B．To search for food.

　　C．To find safer habitats.

　　D．To build up their strength.

　　解析：选B。细节理解题。根据第三段第二句话“Wild horses must move around a lot to find new grass”可知应选B项。

　　30．Why do wild horses live away from people in the distant plains and mountains?

　　A．Because they can escape from people’s hunting.

　　B．Because there are more grasses and water.

　　C．Because they can form large groups there.

　　D．Because they can find deep water there.

　　解析：选A。细节理解题。由最后一段“...they are safer.”可知，大多数野马居住在偏远的高原和山区，因为在那里更安全。故推知A项符合题意。

　　B

　　There are strong arguments on space travel，and below you will find a list of many frequently used arguments.

　　Pros of space travel：

　　—Space travel has inspired many people to continue improving technology such as inventing Velcro and non-stick frying pans.

　　—If you look at the total GDP worldwide，space only accounts for a very small percentage of the total budget.

　　—Better to spend money on our future，than on other projects that would have a much lower potential reward.

　　—If we were to colonize another planet，it would reduce the population on Earth，which is already overpopulated.This will result in the survival of our species when our planet can no longer support human life.

　　—Multinational space stations have helped diplomacy(外交) among multiple nations.

　　Cons of space travel：

　　—There is a very large percentage of the earth’s oceans we have not been explored.We should continue exploring the remaining unknown regions of our oceans before continuing to another planet.

　　—The funding for space exploration comes from the tax payers’ pockets.Many do not think that they should be forced into paying for something they oppose.

　　—The total contribution from space travel is minimal，when considering the total cost.

　　—We should not be thinking about colonizing (占领) a moon，or a planet.It’s better to save our existing planet first.If we are to destroy one planet，what is to stop us from repeating the_mistakes on another planet.

　　—Not only is the cost of manned space missions expensive，but space travel can have a serious effect on the human body over an extended period of time.The only way to solve it is by using robots，which reduces the human risk factor，and reduces the overall cost.

　　　Overall，most people approve of (赞成) our current exploration methods.In my opinion，these methods should be reviewed to help reduce the cost of launches.I believe the potential of finding resources on other planets will make the cost of several decades of space exploration worthwhile.

　　【解题导语】　太空旅行的支持者和反对者都给出什么样的理由呢？

　　31．What would be the best title for this passage?

　　A．The future of space travel

　　B．The benefits of space travel

　　C．Why space travel is expensive

　　D．Whether space travel is worthwhile or not

　　解析：选D。主旨大意题。本文探讨了太空旅行值不值的问题。

　　32．Which of the following benefits of space travel is NOT mentioned?

　　A．Creating more job opportunities.

　　B．Reducing the overpopulation problem.

　　C．Bringing about advanced technologies.

　　D．Developing relationships among countries.

　　解析：选A。细节理解题。根据Pros of space travel部分可知B、C、D三项均有提及，唯独A没提到。

　　33．The underlined part

　　“the mistakes” here probably refers to ________.

　　A．colonizing a moon

　　B．doing damage to Earth

　　C．spending money with little reward

　　D．having a wrong understanding about other planets

　　解析：选B。文章结构题。根据“It’s better to save our existing planet first”可知“the mistakes”指的是我们对地球的破坏。

　　34．Which of the following statements is WRONG according to “Cons of space travel”？

　　A．People get little reward from space travel.

　　B．People should explore unknown parts of our oceans first.

　　C．Robots are too expensive to be used in space travel.

　　D．Tax payers shouldn’t be forced into paying for something they’re against.

　　解析：选C。细节理解题。根据“The only way to solve it is by using robots，which reduces the human risk factor，and reduces the overall cost”可知人们是主张用机器人代替人类“飞天”的。

　　35．What’s the author’s attitude towards space travel?

　　A．Negative.

　　B．Doubtful.

　　C．Positive.

　　D．Not mentioned.

　　解析：选C。作者态度题。根据文章最后一段“I believe the potential of finding resources on other planets will make the cost of several decades of space exploration worthwhile”可知作者的态度是积极的。

　　C

　　Have you ever looked at the Big Dipper (大熊星座) and Little Dipper in the sky? If you have，you’ve looked at the very same stars the ancient Greeks saw thousands of years ago.

　　People have always looked to the sky and wondered about what they saw.The ancient Greeks connected the stars they saw in the sky to form different pictures and made up stories about these pictures using their imagination.Some of these pictures，called constellations (星座)，were based on stories about the superhuman Greek gods.One of them goes like this.

　　The king of the gods，Zeus，had a wife named

　　Hera.Queen Hera became jealous of a pretty woman named Callisto.One day Queen Hera decided to get rid of Callisto，so she changed Callisto into a bear.Callisto was discomposed.She went home for help.On the way，she ran into her son.He did not recognize her as a bear.He aimed his arrow (箭) at her.Just before the arrow flew，Zeus swept down from the sky and turned Callisto’s son into a bear too.Then Zeus took both bears by the tail and threw them up into the sky.That’s how the Little Bear and Big Bear constellations came into being.

　　Imaginary stories about constellations may not seem useful to us now.But ancient people had few tools available to them.As technology developed，so did our understanding of our solar system.

　　【解题导语】　古希腊人通过编故事解读看到的星星，其中大、小熊星座的故事就来源于古希腊神话。

　　36．How did the ancient Greeks understand the stars?

　　A．By making up some stories about stars.

　　B．By drawing beautiful pictures of stars.

　　C．By observing the changes in stars.

　　D．By connecting stars into one constellation.

　　解析：选A。细节理解题。根据第二段“The ancient Greeks connected the stars they saw in the sky to form different pictures and made up stories about these pictures using their imagination”可知，古希腊人通过把看到的星星连接成画，并想象一些关于这些画的故事来解读看到的星星，故选A项。

　　37．Callisto was changed into a bear because ________.

　　A．she didn’t look after her son

　　B．she was too beautiful

　　C．her son killed a bear with his arrow

　　D．she didn’t obey the rules of Hera

　　解析：选B。细节理解题。从第三段的“Queen Hera became jealous of...into a bear”可知，Hera嫉妒漂亮的Callisto，所以把她变成了熊。

　　38．The underlined word “discomposed” in Para.3 can be replaced by “________”．

　　A．grateful

　　B．determined

　　C．upset

　　D．generous

　　解析：选C。词义猜测题。由第三段第四、五句可知，Callisto变成熊后“不安、焦躁与恼怒”，于是回家寻求帮助，故discomposed与upset同义。

　　39．Why did Callisto’s son aim his arrow at her?

　　A．Because her son was encouraged by Zeus.

　　B．Because her son wanted to kill her.

　　C．Because her son would like to help Queen Hera.

　　D．Because her son didn’t know the bear was Callisto.

　　解析：选D。细节理解题。由第三段第七句可知，Callisto的儿子没有认出自己的母亲，误以为是一只熊，所以用箭射了“她”。D为正确答案。

　　40．The underlined word “them” in the last paragraph refers to ________.

　　A．imaginary stories

　　B．constellations

　　C．tools

　　D．ancient people

　　解析：选D。指代题。结合本段内容可知，对于古代的人来说，他们没有多少可以利用的工具，所以这里的them指的是古代的人，故选D项。

　　D

　　Old tennis balls are being used in an unusual way to help us learn more about one of the rarest mammals (哺乳动物) in the country.

　　Harvest mice are only about 2 inches (5 cm) long.This spring and summer，wildlife experts are encouraging people to report sightings of harvest mice so that records can be built up about numbers and locations can be made.

　　Meadows and grassland are animals’ traditional homes but as farming methods change over time，the habitats are being lost and numbers are thought to be declining.

　　Old tennis balls，complete with penny-sized holes，make a strong and popular choice of home for the mice and around 200 are available for surveyors to distribute and monitor，after being donated by a local tennis club.

　　The project，supported by the Leicestershire County Council，is thought to be the biggest of its kind ever run in Leicestershire.

　　County Council wildlife expert，Helen O’Brien，said，“Little is known about the creatures’ present situation locally so we need people to look in tall grass and fields and send in their information.The information will help us track numbers and tell us where we need to focus our attention to safeguard (保障) their future.

　　Anyone interests in getting involved (参与)，can pick up tips and learn more about harvest mice on a training day.This is taking place between 7∶30 p．m.and 9∶30 p．m.on Monday,14th June at the County Council’s Environmental Resource Centre in Birsall.People living in Leicester，Leicestershire and Rutland can get involved with the survey or book a place on the training day by calling Gareth Price at 0116-267-1950.

　　【解题导语】　巢鼠在英国的数量正在减少，英国人想了一个办法来保护它们：向它们提供挖了小洞的旧网球，让它们筑巢用。

　　41．The underlined word “declining” in Para.3 is closest in meaning to ________.

　　A．dropping

　　B．increasing

　　C．keeping

　　D．moving

　　解析：选A。词义猜测题。联系本段前的their homes are being lost可推知，巢鼠的数量在减少。

　　42．According to the passage，old tennis balls are ________.

　　A．seriously polluting harvest mice’s homes

　　B．being used to kill harmful animals in the fields

　　C．being provided for harvest mice as homes

　　D．being collected to raise money to save animals

　　解析：选C。细节理解题。根据第四段“Old tennis balls...make a strong and popular choice of home for the mice”可知，旧网球是给巢鼠筑巢用的。

　　43．The Leicestershire Country Council needs local people to ________.

　　A．donate food for harvest mice

　　B．keep harvest mice as pets at home

　　C．raise more cats to kill harvest mice

　　D．collect information about harvest mice

　　解析：选D。细节理解题。根据第二段“wildlife experts are encouraging people to report...”和第六段“so we need people to...”可知，Leicestershire的郡议会需要人们收集有关巢鼠的信息。

　　44．We learn from the last paragraph that ________.

　　A．the training is going to be provided on July 14

　　B．the training about harvest mice will last two hours

　　C．only people living in Leicester can get involved

　　D．Gareth Price will be the trainer on the training day

　　解析：选B。细节理解题。根据最后一段“This is taking place between 7∶30 p．m.and 9∶30 p．m.”可知，培训将进行两个小时。

　　45．What is the best title for the passage?

　　A．Harvest mice like old tennis balls

　　B．The importance of tennis balls

　　C．The rarest animal：harvest mice

　　D．Harvest mice’s homes are being lost

　　解析：选A。标题归纳题。本文主要讲述了在英国，为了保护巢鼠，人们向它们提供挖了小洞的旧网球作巢穴，故A作为标题最合适。

　　第二节　信息匹配(共5小题；每小题2分，满分10分)

　　阅读下列应用文及相关信息，并按照要求匹配信息。

　　下面是一些孩子喜欢的书的封面及书名：

　　以下是一些孩子喜欢的书的简介。请将简介与封面图片匹配：

　　46．A book that makes the simple，everyday activities of a little boy into a long story.When Peter awakes to the first snow of the season，every detail of the day－from rolling a snowball to making snowmen－becomes magical.

　　解析：选D。根据所描述的“When Peter awakes to the first snow of the season...from rolling a snowball to making snowmen...”可知，这本书应该与雪有关。D的名称The Snowy Day与封面都是与雪相关的。由此可知答案。

　　47．A very hungry caterpillar eats his way through a variety of foods－and even the book－before changing into a butterfly.Along the way，readers learn about colors－not to mention the life cycle(循环) of a caterpillar.

　　解析：选B。根据所描述的“A very hungry caterpillar...before changing into a butterfly.”可知，这本书描述的是一只毛毛虫变为蝴蝶的经过。这与B的书名以及封面是一只毛毛虫相符合。

　　48．Oh，that hungry mouse.Once you give him the cookie，this movement is unstoppable! By the end，the mouse，the boy that gives him the cookie are both very tired!

　　解析：选F。根据所描述的hungry mouse，the cookie等关键词可知，这本书是描述的一只老鼠和一块甜点的故事。这与F的书名以及封面中的老鼠相符合。

　　49．A story about a fruit bat raised by birds，this book celebrates (赞美) independence.As a beautifully told tale with beautiful pictures and some information about bats as well，this book is well worth reading.

　　解析：选E。根据所描述的“A story about a fruit bat”可知，这本书应该与蝙蝠相关。这与E封面及题目“Stellaluna，A Bat”相符合。

　　50．When Max is sent to bed without his dinner，he imagines an adventure(冒险)to the land of the Wild Things，where he meets a crowd of unusual animals.When he becomes homesick，he wakes up in his bedroom to find his warm supper waiting for him.

　　解析：选A。根据所描述的“When Max is sent to bed without his dinner，he imagines an adventure(冒险) to the land of the Wild Things，where he meets a crowd of unusual animals.”可知，这本书所描述的是Max进入了一个特殊的地方并遇见了很多非同寻常的动物。这与A的书名Where the Wild Things Are相符合。

　　Ⅲ.写作(共两节，满分40分)

　　第一节　基础写作(共1小题，满分 15分)

　　近年来，环境恶化，自然灾害频发，对人们的生命和财产造成了巨大的损失。请你针对这一现象，谈谈面对自然灾害我们应该采取哪些措施。

　　【写作内容】

　　1．简要叙述近年来自然灾害发生的现状；

　　2．对于自然灾害我们应该采取的举措有哪些。

　　【写作要求】

　　1．必须使用5个句子介绍所给出的全部内容；

　　2．可根据内容要点适当增加细节，以使行文连贯。

　　参考词汇：possession财产。

　　【评分标准】

　　句子结构准确，信息内容完整，篇章连贯。

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　　One possible version：

　　As we all know，there have been more and more natural disasters in recent years such as floods，droughts，earthquakes and so on，which have caused a great loss to our lives and possessions.So some measures

　　must

　　be

　　taken

　　to

　　deal

　　with

　　these frightening natural disasters.

　　First of all，building strong warning systems is very necessary，which will help people get ready for the disasters，so we may greatly reduce the loss.Secondly，the whole world should spare no effort to protect the environment in order to avoid some natural disasters caused by human activities.Last but not least，countries should cooperate with each other，setting up powerful rescue systems to reduce the damage in the stricken regions.

　　第二节　读写任务(共1小题，满分25分)

　　阅读下面的短文，然后按照要求写一篇150词左右的英语短文。

　　Scientists have worried for a long time over the effect of a seriously large asteroid(小行星) hitting the earth.After all，it is likely that the force of such an object from space wiped out the dinosaurs 65 million years ago.Their fears were reignited(重新激起)when a huge asteroid hit the atmosphere above an island in Indonesia.Scientists at the University of Western Ontario were able to hear the blast (爆炸) 16,000 kilometers away.A bigger asteroid could well have got through the atmosphere and done great damage.

　　What really concerns scientists is that our telescopes were unable to discover the asteroid.If it had been larger and hit the Earth’s surface，who knows what the damage could have been.According to New Scientist，such object hit the earth about once every 10 years.Although no one was killed by the asteroid in Indonesia，no one knows what will happen when the next asteroid comes.

　　【写作内容】

　　1．以约30个词概括上面文章的要点；

　　2．以大约120个词结合你自己的体会谈一下你对这个问题的看法。

　　【写作要求】

　　1．在作文中可以使用实例或其他论述方法支持你的论点，也可以参照阅读材料的内容，但不能直接用原文中的句子；

　　2．作文中不能出现真实姓名和学校的名称。

　　【评分标准】

　　概括准确，语言规范，内容合适，语篇连贯。

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　　One possible version：

　　As is mentioned in the passage above，scientists are worrying that one day an asteroid may hit the earth and cause great disasters to human beings.

　　In my opinion，there is no need to worry about it.On the one hand，hundreds of asteroids have hit the atmosphere since 65 million years ago，but none of them have caused great damage to the earth.So we can believe we are safe now，and we will be safe for the next hundreds or thousands of years.On the other hand，with the development of modern science and technology，we can build

　　more powerful telescopes in the years to come，which may help us to discover such asteroids before they hit the earth.Perhaps we can attack them by using huge rockets and change their direction so that they won’t hit us.In a word，believe in ourselves!