限时作业2（写写帮整理）

第一篇：限时作业2（写写帮整理）

限时作业2(必修1 Unit 2)

Ⅰ.完成句子

1.教育在人们的生活中起着重要的作用。

Educationin people’s life.2.这本书是以一个发生在1930年的真实故事为背景的。

The booka true story that happened in 1930.3.你能到我公寓来看看吗?

Would youmy flat?

4.这所学校里不止一个人精通英语。

More than one personEnglish in the school.5.他们开始考虑如何利用这一机会。

They began to think about how tothis chance.Ⅱ.语法和词汇知识

1.His Shandongwas so strong that I couldn’t understand a word he was saying.A.noiseB.voice

C.accent D.sound

2.Mary asked me, “Have you really realized the part the computer hasin the daily life?”

A.made B.given

C.caused D.played

3.—We are having a little party at the weekend.Can you and Mary come?

—.Thank you.But I’ll have to visit my grandpa.A.If you don’t mind.B.That sounds nice

C.No way D.Not at all

4.The manager requested that no oneof his decision until the next meeting.A.would tell B.told

C.be told D.would be told

5.—Go for a trip to Qingdao, OK?

—.I’d like to see the sea.A.I couldn’t agree more B.I’m afraid not

C.I believe not D.I don’t think so

6.This design issatisfactory.So you’ll have to try your best to better it.A.nothing but B.anything but

C.all but D.everything but

7.—So you didn’t say hello to her last night?

—Well, I stopped and smiled when I saw her, but sheme and walked on.A.ignored B.refused

C.denied D.missed

8.It turned out that one of the children I thought a girl wasa boy.A.specially B.usually

C.especially D.actually

9.I didn’tmy primary school classmate Jane until I listened to her

self-introduction.A.know B.recognize

C.find D.realize

10.Jack recommended me a few foreign movies, butwas to my taste.A.all B.neither

C.some D.none

11.It is raining, so stop punishing the child andhimcome in the room.A.make;to B.get;to

C.keep;/ D.get;/

12.The number of people invitedfifty, but a number of themabsent for different reasons.A.were;was

C.was;were B.was;was D.were;were

13.Judging from the number of the audience, the movieon the novel written by Jin Yong is well worth seeing.A.basing B.is based

C.based D.to be based

14.(2012·陕西西安地区八校联考)If better use isof your spare time, you’ll make greater progress in it.A.spent B.made

C.taken D.thought

15.I’ve been to many countries, New Zealand,.A.as B.like

C.such as

Ⅲ.阅读理解

1.Most people consider skydiving(高空跳伞)a product of the 20th century, but its history actually goes further back than that.The Chinese attempted parachuting(跳伞)in the 10th century, a thousand years before we did.The Chinese did what we would today call base diving;that is, they jumped off a place that would allow them to float from a height to the ground.The first person to attempt to parachute was a Frenchman named Jacques Garnerin.He jumped from his air balloon at the end of the 18th century and did tricks on the way down and stupefied the crowds by landing safely on the ground.At the end of the 19th century, Kathie Paulus, a brave German woman, became famous for her skydiving skills.Once the airplane was invented, skydiving took on a whole new form.The airplane made it possible to dive from greater heights at greater speeds, allowing for more range in the movements in the air.A woman named Tiny Broadwick became the first woman to jump from a plane in 1913 and to dive free fall in 1914.Skydiving was not called skydiving until the middle of the 1950s, when Ronald Young coined(创造)the word.It had been called parachuting prior to this and was primarily used by the military to land troops in inland locations, or for pilots to bail(跳伞)out of their planes when necessary.Once World War Ⅰ was over, parachuting became a sport, which we now call skydiving.After World War Ⅱ, this activity became more a hobby than a military maneuver(行动).Soldiers were trained in parachuting and enjoyed the thrill so much that they continued on for fun.From D.for example

this, teams and competitions were formed.Skydiving schools appeared in the late 1950s and now it is a recognized extreme sport enjoyed by many.1.The underlined word “stupefied” in Paragraph 2 probably means “”.A.disappointed B.encouraged

C.surprised D.attacked

2.Who was the first woman to jump from a plane?

A.Jacques Garnerin.B.Kathie Paulus.C.Tiny Broadwick.D.Ronald Young.3.Which of the following is TRUE?

A.The Chinese attempted different skydiving skills in the 10th century.B.Skydiving became popular after the airplane was invented.C.The word skydiving was first used in a military action.D.There were no skydiving schools until the late 1950s.4.What would be the best title for this text?

A.The history of skydiving

B.The popularity of skydiving

C.What is skydiving?

D.Why is skydiving an extreme sport?

Ⅳ.七选五阅读理解

1.根据短文内容, 从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。1 A well-developed and presented story can cut across age barriers and will hold the interest and reach its listeners.Knowing and applying the basics of storytelling will strengthen your stories.Finding stories:

There are many kinds of stories you can work with, including folktales from many countries and cultures, humorous tales and traditional fairytales in numerous versions, etc.2 With time and experience you will perhaps want to tell your own personal stories.Adapting to our audience:

The audience play a very important role in oral story-telling.3 I have observed that our audiences have lost some of the skills to follow a story and see things in their minds, which makes storytelling more difficult.Therefore, you should keep your story brief and simple.Attracting the attention of our audience:

Many factors affect the attention of your listeners.So tellers always need to be sensitive to the audience and may need to regain their attention before continuing.In order to hold your audience’s attention all the time, you’d better use volunteers from the audience in your story, or have the audience participate in hand motions or making sound effects.4Concluding:

Once you finish the story, stop!5 Let them go away thinking about what has been said, and drawing their own meaning from it!

A.Effective storytelling is a fine and beautiful art.B.The more you practice, the more skilled you will become.C.Don’t feel you have to explain everything, or tie together all loose ends.D.It is recommended you start with simple folktales.E.It is the most important that you should tell your story in your own words with enthusiasm.F.That’s because oral storytelling involves much interaction between the teller and the hearer.G.Also, making a distinct change in your pace, voice, or mood is helpful in regaining your audience’s attention.Ⅴ.书面表达

1.最近, 你校学生会发起了 “杜绝食堂浪费” 的活动, 要求各班举办英语主题班会。请你按照下面要点提示准备一篇英语演讲稿。

1列举学校食堂浪费现象;

2陈述浪费造成的不良后果;

3号召同学们从自身做起, 杜绝浪费。

注意:1词数100左右, 演讲稿的开头和结尾已经写好, 不计入总词数。

2可适当发挥, 以使行文连贯。

Dear classmates,May I have your attention, please?I’d like to talk about the problem of wasting in our canteen.That’s all.Thank you!

##

答案：

Ⅰ.完成句子

1.plays an important role/part 2.is based on 3.come up to;for a visit 4.has a good command of 5.make use of

Ⅱ.语法和词汇知识

1.C 句意:他的山东口音这么重以至于他说的话我一句也没听懂。noise “噪音”;voice “声音”;accent “口音”;sound “声音”。

2.D play a part in...意为 “在„„中发挥作用”, A、B和C选项不与the part构成固定搭配。句意:玛丽问我, “你真的意识到电脑在日常生活中所发挥的作用了吗?”

3.B 对于对方的邀请, 要先表示感谢, 即使不能接受邀请, 语气也要委婉。no way 用来表示坚决拒绝。not at all “一点也不”, 用于回答别人的道歉。if you don’t mind “如果你不介意的话”。

4.C 句意:经理要求在下次会议之前, 他的决定不能告诉任何人。request 后面接的宾语从句要用 “should + 动词原形” 的虚拟语气形式, 其中should可省略;no one 和tell之间为被动关系, 故用被动语态, 因此C项正确。

5.A 从 “I’d like to see the sea” 可知, 这里是同意去青岛旅游的建议, 故选A项, 意为 “完全同意”。其他选项都是对对方提议的否定, 故不符合语境。

6.B 句意:这个设计绝不令人满意, 因此你要全力来改善它。A项意为 “仅仅”;B项意为 “绝不”;C项意为 “几乎, 差不多”;D项意为 “除了„„之外所有的„„”。根据句意选B项。

7.A ignore “不理睬, 忽视”;refuse “拒绝”;deny “否定, 否认”;miss “错过”。第二句话的意思:哦, 当我看到她时我停下来向她微笑, 但她不理我继续向前走。

8.D 句意:其中一个孩子我原以为是个女孩, 结果其实是个男孩。specially “特别地, 专

门”;usually “通常”;especially “极其, 非常”;actually “实际上”。根据句意选D项。

9.B 句意:直到听了简的自我介绍我才认出她是我的小学同学。recognize “认出, 承认, 认可”。

10.D 句意:杰克向我推荐了几部外国电影, 但是没有一部合我的口味。A项意为 “(三者及其以上)都”;B项意为 “(两者)都不”;C项意为 “一些”;D项意为 “(三者或三者以上)都不”。只有D项符合语境。

11.B get sb.to do sth.意为 “让某人做某事”。keep 后面不能跟不定式作宾补;make 后面跟不定式作宾补时不带to。所以答案选B项。句意:下雨了, 不要再惩罚孩子了, 让他进屋吧。

12.C“the number of + 可数名词复数” 作主语时, 表示 “„„的数量”, 谓语动词用单数形式;“a number of + 可数名词复数” 作主语时, 表示 “很多„„”, 谓语动词用复数形式。句意:受邀请的人数是五十, 但是他们中很多人由于不同的原因缺席了。

13.C 在主句中, based on the novel written by Jin Yong作the movie的后置定语, 意为 “the movie was based on the novel written by Jin Yong”。be based on意为 “以„„为基础”。句意:从观众的数量来看, 这部在金庸的小说基础上改编而来的电影很值得一看。

14.B 句意:如果你能充分利用你的业余时间的话, 你就会取得更大的进步。make better use of “更充分利用”。

15.D for example 和such as 均可表示列举, 前者用于举例说明, 一般只列举同类人或事物中的一个, 作插入语, 用逗号隔开, 可置于句首、句中或句末;后者用于列举事物, 常用于列举一系列的事物, 并且后面不用逗号。句意:我去过很多国家, 比如新西兰。

Ⅲ.阅读理解

1.C 猜测词义题。根据第二段语境可知, 雅克·加纳林在下降的过程中做了很多特技动作并安全降落, 故可以推测他的表演让观众目瞪口呆。故选C项。

2.C 细节理解题。根据第三段最后一句 “A woman named Tiny Broadwick became the first woman to jump from a plane in 1913...”可知C项正确。

3.D 细节理解题。根据最后一段末句 “Skydiving schools appeared in the late 1950s” 可知D项正确。

4.A 主旨大意题。通读全文可知, 本文按照时间顺序讲述了特技跳伞运动的历史。故选A项。Ⅳ.七选五阅读理解

1.A 2.D 3.F 4.G 5.C

Ⅴ.书面表达 1.Dear classmates,May I have your attention, please?I’d like to talk about the problem of waste in our canteen.As we all know, the problem of waste in our canteen is severe.For example, some students just throw away what they don’t like eating.Some leave the water running after doing the dishes and leave the air-conditioner on after leaving the canteen.It is not only a waste of money, but also makes global warming even worse.In my opinion, it is everybody’s duty to fight against waste.On the one hand, we should form the habit of eating what we order.On the other hand, we should make it a rule to save water and electricity when possible.That’s all.Thank you!

第二篇：警钟长鸣限时作业

限时作业：

学校班级姓名判断对错：

（1）摩托车驾驶员驾驶摩托车必须戴安全帽。（）

（2）汽车驾驶员开车时也要戴安全帽。（）

（3）过马路时遇到红灯，但是没有车，我快快过马路。（）

（4）过马路时不走斑马线。（）

（5）翻越马路上的护栏。（）

（6）在马路边上玩皮球。（）

（7）黄灯亮时，不准车辆.行人通行，但已越过停止线的车辆

和进入人行横道的行人，可以继续通行。（）

自评______组长评

第三篇：③等比数列课后限时作业

课后限时作业（二十六）

（60分钟，150分）

(详解为教师用书独有)

A组

一、选择题（本大题共6小题，每小题7分，共42分）

1.（2008·福建）设{an}是公比为正数的等比数列，若a1＝1，a5＝16，则数列{an}前7项的和为()

A．63B．64C．127D．128

解析：a1＝1，a5＝16，所以q

41－2而S7＝＝127.1－

2答案：C

2.已知等比数列{an}满足a1+a2=3,a2+a3=6,则a7=()

A.64B.81C.128D.24

3解析：因为q=

答案：A

3.在等比数列{an}中，a1=1,a10=3,则a2a3a4a5a6a7a8a9=()

A.81B.27

C.7a516，因为q>0,所以q＝2，从a1a2a3 =2,所以a1+a1q=3  a1=1,a7=1×27-1=64.a1a2D.243

解析：由等比数列的性质可得，a1a10=a2a9=a3a8=a4a7=a5a6，从而a2a3a4a5a6a7a8a9=(a1a10)=81.答案：A

4.（2010·辽宁）设Sn为等比数列{an}的前n项和，已知3S3＝a4-2,3S2=a3-2,则公比q=()

A.3B.4C.5D.6

解析：两式相减得,3a3=a4-a3,a4=4a3,所以q=

答案：B

5.设等比数列{an}的前n项和为Sn，若S6∶S3＝1∶2，则S9∶S3等于()

A.1∶2B.2∶3C.3∶4D.1∶3

解析：因为{an}为等比数列，所以S3,S6-S3,S9-S6成等比数列，即(S6-S3)=S3·(S9-S6).又因24a4 =4.a3

为S6∶S3=1∶2,所以答案：C

1213

S3 =S3(S9-S3),即 S3=S9,所以S9∶S3=3∶4.244

6.（2010·湖北）已知等比数列{an}中，各项都是正数，且a1,12a3,2a2成等差数列，则a9+a10a7+a8=()

A.1+ C.3+2

B.1-

D.3-2

解析：依题意可得，2×

122

a3=a1+2a2,即a3=a1+2a2  a1q=a1+2a1q,q=1+2q,解得

q=1+ 2

或

q=1-(舍去），答案：C

二、填空题（本大题共4小题，每小题6分，共24分）

7.已知等比数列{an}的前三项依次为a-1,a+1,a+4,则公比q等于解析：(a+1)=(a-1)(a+4)答案：

 a=5,q=

a16

3.a1

423 2

8.（2010·福建）在等比数列{an}中，若公比q=4,且前3项之和等于21，则该数列的通项公式an.解析：由题意知a1+4a1+16a1=21,解得a1=1,所以通项an=4答案：4

n-

1n-1

.n

9.若数列{an}的前n项和为Sn=3-a,数列{an}为等比数列，则实数解析：由题易知S1=3-a,S2=9-a,S3＝27-a,故a1=3-a,a2=6,a3=18.若{an}是等比数列，则

618

 =3,则a＝1.3a6

答案：1

10.设f(n)=a+a+a+a+…+a

710

3n+10

(a≠0,n∈N),则f(n)=.解析：通项an=a

3n-2

a(1an4),f(n)是前n+4项的和，当a=1时,f(n)=n+4,当a≠1时，f(n)=.1a

n4,a1,

答案：a(1an4),a1.1a

三、解答题（本大题共2小题，每小题12分，共24分）11.（2011届·福州质检）数列{an}的前n项和Sn=n+2n.（1）求数列{an}的通项公式；

（2）若正项等比数列{bn}满足b2=S1,b4=a2+a3,求数列{bn}的前n项和Tn.解：（1)a1=S1=3，当n≥2时，an=Sn-Sn-1=n+2n-［(n-1)+2(n-1)］=2n+1，符合n=1题意，所以an=2n+1(n∈N*).(2)设等比数列{bn}的公比为q,则 b2＝3,b4=5+7=12,即b1q=3,b1q=12，12.已知数列{an}的前n项和为Sn，且Sn=（1）求a1,a2;

（2）证明数列{an}是等比数列，并求Sn.（1）解：因为Sn=

（an-1）（n∈N*）.3（an-1）, 3

（2）证明：由an=Sn-Sn-1an=（an-an-1）an=-为首项，公比q=-

1311an-1（n≥2）,所以{an}构成以a1=-2

2的等比数列.2

B组

一、选择题(本大题共2小题，每小题8分，共16分)

1.在等比数列{an}中，a1=2,前n项和为Sn，若数列{an+1}也是等比数列，则Sn等于()A.2n+

1-2B.3nC.2nD.3-1

n-1

n

解析：因数列{an}为等比数列，则an=2q(an+1+1)=(an+1)(an+2+1)

22,因为数列{an+1}也是等比数列，所以

a2n+1+2an+1=anan+2+an+an+2an+an+2=2an+1

an(1+q-2q)=0q=1.即an=2,所以Sn=2n,故选C.答案：C

2.已知{an}是等比数列，a2=2,a5=

-n,则a1a2+a2a3+…+anan+1=()

4-n

A.16(1-4)B.16(1-2)C.3232-n-n

(1-4)D.(1-2)3

3解析：因为q=

11a51

=,所以q=,a1=4,数列{an·an+1}是以8为公比的等比数列，24a28

不难得出答案为C.答案：C

二、填空题（本大题共2小题，每小题8分，共16分）

3.在等比数列中，已知a9+a10=1,a19+a20=10,则a99+a100.解析：a19+a20=(a9+a10)·q

q10=10,利用a9+a10,a19+a20,…,a99+a100成等比数列，得

a99+a100=(a9+a10)·q=109.答案：109

4.(2010·天津)设{an}是等比数列，公比,Sn为{an}的前n项和.记Tn=

17SnS2n,an

1n∈N*.设Tn0为数列{Tn}的最大项，则n0.解析：本题主要考查了等比数列的前n项和公式与通项及平均值不等式的证明，属于中档题

.因为

+

n

≥8,当且仅当

所以当n=4时T有最大值.＝4,即n=4时取等号，n

0n

答案：

4三、解答题（本大题共2小题，每小题14分，共28分）5.已知数列{an}的首项a1=

122an,an+1= ,n=1,2,3,….证明：数列1是等比数列

.3an1an

所以数列

111

1是以为首项，为公比的等比数列.22an

6.（2010·全国Ⅱ）已知{an}是各项均为正数的等比数列，且

(1)求{an}的通项公式；

1

(2)设bn= an,求数列{bn}的前n项和Tn.an

解：（1）设公比为q,则an=a1q

n-1

.由已知有

第四篇：19 草船借箭限时作业

草船借箭

学校班级姓名等级

一、看拼音写词语。

dù jìdū dutuī quâyán chítàn tīnɡmàn zǐsī zì（）（）（）（）（）（）（）diào dùshuǐ zhàilãi ɡǔ nà hǎnzhī yuánchãnɡ xiànɡxiàn qī（）（）（）（）（）（）zhí yǒu miào yînɡshãn jī miào suàn

（）（）

二、在括号里填上恰当的关联词。

1、周瑜（）知道了，我的计划（）完了。

2、（）诸葛亮（）能在三天之内造十万支箭。

3、（）诸葛亮识天文，懂地理，（）他答应周瑜三天内造十万支箭。

三、按课文内容填空。

1、课文是按照事情发展顺序写的，先写了，接着写了，着重写了，最后写了。

四、多项选择：

从文中哪里可以看出诸葛亮“神机妙算”？正确的打“√”。

①他知道第三天四更时分一定有大雾。（）

②他算好了受箭的方法，二十条船可以绳索相连，一字排开，两面受箭。（）

③他算好了人，知道鲁肃忠厚诚信向他借船没事，周瑜聪明过人，曹操生性多疑。（）④诸葛亮能算，因为他是神仙。（）

五、品味探究。

1、“鲁肃回来报告周瑜，果然不提借箭的事，只说„„”

从这句话中，我感受到鲁肃。

2、从“诸葛亮又下令把船掉过来，船头朝东、船尾朝西，仍旧擂鼓呐喊”从这句话中，我感受到诸葛亮。

3、“雾这样大，曹操定不敢派兵出来。我们只管饮酒取乐，天亮了就回去。”

这段话是对说的，表现了他的特点。

4、从“曹操下令说：‘江上雾大„„不要轻易出动。只叫弓弩手朝他们射箭„„’”从这句话中，我感受到诸葛亮，曹操。

第五篇：限时作业1(Book 1 Unit 1)

限时作业1(必修1 Unit 1)Ⅰ.完成句子

1.大家都能看出他是故意欺骗我。

Everybody could see that he cheated me

.2.阴雨连绵的天气彻底破坏了我们的假期。

Our holiday was completely spoiled by

wet days.3.他们一见钟情。

They

with each other at first sight.4.我们到达时他们已经开始收拾行李了。

We arrived just as they

their luggage.5.她听腻了他们的印度之行。

She

hearing about their trip to India.Ⅱ.语法和词汇知识

1.I think it’s high time that we effective measures to prevent the accidents.A.take

B.took C.have taken D.are taking 2.It was in Beihai Park where they made a date that the old couple told us their love story.A.the first time B.for the first time C.first time D.on the first time 3.(2012·浙江杭师大附中月考)— Do you still believe in love? — Absolutely.It is not time, money, power or whatever but love can cure our pain.A.who B.which C.that D.what 4.Faced with the threat of terrorism, they have agreed to their differences in politics and unite to defend national security.A.set aside B.set about C.set off D.set up 5.All those about the poor children should be.A.concerned;thanked B.are concerned;thanked C.who are concerned;thanked for D.are concerned;thanked for 6.—

matters to do the job well—what you are or where you come from? —Neither.It depends on whether you put your heart into it.A.Which is it that C.Which it is that B.What it is that D.What is it which 7.The travellers started early reach Yuntai Mountain before 10 o’clock.A.in order to B.so that C.in order that D.because of 8.It 1920 regular radio broadcasts began.A.was until;when B.was until;that C.wasn’t until;when D.wasn’t until;that 9.I used to quarrel a lot with my parents, but now we well.A.look out C.carry on B.stay up D.get along 10.is known to us all, good friends happiness and value to life.A.It;add B.As;add C.It;add to D.As;add up 11.We were surprised by what the little girl when she was cheated and sold to the mountain village.A.got through B.went through C.live up to D.go against 12.Space exploration has been made with the development of modern science and technology.A.it possible B.it was possible C.that possible D.possible 13.—You are always.Can you tell me the secret? —Taking plenty of exercise every day.A.powerful B.weak C.forceful D.energetic 14.—David, it’s Frank.Could you spare me a few minutes?I need to see you.—

.But I hope “a few minutes” won’t turn into an hour.A.I’m afraid not B.It doesn’t matter C.I don’t think so D.I guess so 15.—The boy’s vocabulary is limited, isn’t it? —

.He has an extensive vocabulary.A.You’re right B.That’s OK C.It doesn’t matter D.I guess not Ⅲ.完形填空

1.Taking frequent short breaks is better for you than one long holiday, psychologists have found.1 believe that people who use their holiday allowance in bursts 2 all in one go are happier.They claimed that people who 3 so-called mini-breaks have more 4 memories than those who spend their holidays for an extended period of time.Dan Ariely, a famous behavioural economist who 5 The Upside of Irrationality, suggested that holidaymakers 6 extended time away by doing some work in the middle of their break 7 this would make them more appreciative of their time away from the 8.The explanation is that people’s enjoyment wanes(减弱)as they become 9 to their holiday lifestyle.Professor Ariely, who 10 at Duke University in North Carolina, said, “On a long 11 , day seven is not as good as day one 12 it is not as exciting.That’s why 13 , going away four times a year provides more 14 than you would expect, and going away for one 15 is not as good as you would expect.”

, other experts disagree.Tim Harford, the author of Dear Undercover Economist, said that taking an increased 17 of trips would only increase the 18 associated with travelling to and from a holiday destination.He said, “If you 19 three times as many

holidays into the same amount of leave, you can expect three times as much 20.It’s obvious to me that it’s not worth it.” 1.A.Teachers B.Economists C.Researchers D.Tourists 2.A.rather than B.in spite of C.other than D.in case of 3.A.damage B.take 4.A.clear 5.A.shared C.break up C.denying 8.A.office C.attached C.teaches 11.A.road C.journey C.prefer D.want B.long C.happy D.powerful B.read C.collected D.wrote D.put off B.describing D.saying B.family C.school D.market D.accustomed D.stays B.vacation D.term 6.A.break in B.put away 7.A.predicting 9.A.addicted B.attentive 10.A.surveys B.rests 12.A.because B.so C.if D.although 13.A.in all B.by chance C.in general D.by contrast 14.A.aid B.benefit C.interest D.pressure B.However

D.number 15.A.day B.year C.season D.week 16.A.Therefore 17.A.price C.pleasure 19.A.wash C.Otherwise D.Still B.risk C.quality B.stress D.effect B.fetch C.pack D.operate 18.A.happiness 20.A.trouble B.time C.information D.money Ⅳ.七选五阅读理解

1.根据短文内容, 从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Imagine that you are swimming in the middle of an ocean.You look down and see a wonderful underwater land of colours and fish of all shapes and sizes.This is the huge and colourful land of coral and the home of millions of different fish.1 Therefore, most coral reefs started developing over 10,000 years ago.Coral reefs are living structures built up over thousands of years by tiny animals called polyps(珊瑚虫), which usually live together in groups.Each polyp makes a stony skeleton(骨骼)around its body, and the skeletons of all the polyps in a group are joined together.When

the polyps die, their bodies decay.Their hard skeletons remain behind.2 Gradually, over long periods of time, reefs of coral skeletons are built up in the ocean, with living coral on the surface.3 It stretches for more than 1300 miles along the Northern Eastern coast of Australia.The Great Barrier Reef has more than 2600 kinds of coral altogether.It is the largest group of coral in the world.All together, it covers an area about half the size of Texas.The Great Barrier Reef does a lot of things for a lot of people, not just fish.It gives the fishermen plenty of fish, gives the tourists something to look at, and gives the scientists something to study.4 This happens by pollution and throwing anchors on the Great Barrier Reef.Worldwide, there are more than 4000 kinds of reef fish.The Great Barrier Reef supports about 1500 different species of fish.Some of the fish that live in it are crabs, sea turtles, sea sponges, and colourful marine worms.5 Those are only some of the species out of the thousand, and still we find more species every year.However, if we don’t start protecting the reef the fish will be in danger or eventually die.A.Coral only grows a few inches each year.B.New polyps grow on the top of the ones that died.C.You realize it is the home of millions of different fish.D.Here are some facts about coral that are really interesting.E.The Great Barrier Reef is one of the earth’s natural wonders.F.However, many people kill parts of it, and it is in danger of extinction.G.Also, you would probably see a big blue starfish, snails with beautiful shells and sharks.Ⅴ.短文改错

1.One evening, Helen was preparing her examination in the basement of the house.Her parents had gone out shopping.Suddenly, he heard footsteps on the floor below.Known that she was the only person at home, she was frightened.Obviously, a thief has come in through the window that had been left opened for fresh air.Picking up her courage, Helen took a toy gun from the cupboard and went to upstairs.On her way, she shouted, “George, take the dog out.” To frightened the thief, she turned off some lights.The thief must have heard all the noises but rushed out through the window where he came in.Now, Helen felt somewhat relieved.## 答案：

限时作业1(必修1 Unit 1)Ⅰ.完成句子

1.on purpose 2.a series of 3.fell in love 4.were packing up 5.was tired of Ⅱ.语法和词汇知识

1.B 在It’s high time that...句型中, 从句通常用虚拟语气, 谓语动词用一般过去式。句意:我认为的确到我们采取有效措施阻止事故发生的时候了。故B项正确。

2.B 这是一个强调句, 被强调的部分是in Beihai Park, 其后跟有where引导的定语从句。句意:这对老夫妇就是在他们第一次约会的北海公园里给我们讲了他们的爱情故事。for the first time作状语修饰made a date, 故B项正确。

3.C 句意:——你还相信爱吗?——非常相信。不是时间、金钱、权力而是爱能治愈我们的痛苦。这是一个强调句, 被强调部分用not...but连接。

4.A 句意:面对恐怖主义的威胁, 他们同意将政治上的分歧放在一边, 团结起来保卫国家的安全。set aside “把„„放在一边”;set about “开始着手(做„„)”;set off “出发, 引爆”;set up “建立”。根据句意选A项。

5.A 考查非谓语动词及被动语态。concerned...此处为过去分词短语作后置定语, 修饰all those;后一个空应用过去分词构成被动语态。句意:所有那些关心贫困儿童的人都应该受到感谢。6.A 考查强调句型的特殊疑问句。由or可以判断, 此句中疑问词用which, which后用疑问语序, 而which 又是强调句中被强调的部分, 因此强调句中用that, 故选A项。

7.A “in order to + 动词原形”引导目的状语;so that 和in order that引导从句;because of 引导原因状语, 后面接名词或动词-ing形式。句意为:游客们为了在十点以前到达云台山, 很早就出发了。

8.D not...until的强调句型为:It is/was + not until...+ that/who...。

9.D 句意:我以前经常跟父母吵架, 但现在我们相处得很好。look out “当心, 小心”;stay up “熬夜, 挺住”;carry on “继续, 进行”;get along “相处”, get along well “相处得好”。从前面的quarrel a lot和but可知, 这里指 “相处得好”。

10.B 句意:我们大家都知道, 好朋友会让生活更幸福、更有意义。as引导非限制性定语从句, 用逗号和主句分开了。add...to...“把„„增加到„„, 为„„增添„„”;add to “增加, 增添”;add up “加起来”。

11.B 句意:我们都被这个受骗后被卖到山村的小女孩的经历震惊了。go through “经受, 经历”;get through “通过, 用完, 完成”;live up to “达到, 符合, 不辜负(别人的期望)”;go against “反对, 不利”。根据句意选B项。

12.D make + 宾语 + 宾语补足语(多由名词、形容词、动词原形或过去分词来充当)意思是 “使„„”。题干中make用作了被动语态, 形容词possible作主语补足语。句意:现代科学技术的发展已经使得太空探索成为可能。

13.D You are always energetic意为 “你总是充满活力”。powerful “强大的, 有力的”;weak “虚弱的, 薄弱的”;forceful “强有力的, 坚强的, 有说服力的”;energetic “精力充沛的”。故D项正确。

14.D 句意:——大卫, 我是弗兰克。你有几分钟时间吗?我想见你。——我想我有时间, 但我希望几分钟别变成一小时。I’m afraid not “恐怕不行”;It doesn’t matter “没关系”;I don’t think so “我想我没空”。根据句意, 选D项。

15.D I guess not意为 “我不那么认为”。根据所提供的情景, 可判断说话人不同意对方的观点。句意:——这个男孩的词汇量有限, 是吗?——我不那么认为。他的词汇量很大。Ⅲ.完形填空

1.C 本文叙述了一项关于长假与短假带给人们的不同心理感受的研究成果, 所以这里指研究人员。2.A 前后的成分对比, 用rather than, 表示“而不是”。心理学家发现, 人们度短假比度长假更开心。

3.B 根据前句中who use their holiday allowance in bursts可知, 这里指度短假的人, 故用take。4.C 根据第一段中is better for you可知, 度短假的人有更快乐的回忆。5.D 丹·艾瑞里 “写” 了这本书。

6.C 根据句中doing some work in the middle of their break可得出答案。break up“分开, 打破”。

7.D 后半句内容为丹·艾瑞里发表的言论, 故用saying。8.A 这里指人们离开办公室去度假, 故用office。

9.D 根据语境可知, 当人们适应了假期的生活方式后, 他们的乐趣就会减弱。be accustomed to表示 “适应”。

10.C 根据艾瑞里的称谓professor判断, 他应在杜克大学教书。11.B 根据句中day seven和day one可知, 这里指在休一次长假的时候。12.A 从前后句意看是因果关系。

13.C 根据句中four times a year可知, 每年外出度假四次是从总体上来说的。14.B 根据句中is not as good as对比可知, 这里是度假带来的益处。

15.D 根据语境和前文day seven is not as good as day one可推断, 这里指外出一周。16.B 根据句中other experts disagree可知, 这里用however表示转折。17.D 根据语境可知蒂姆·哈福德认为, 这里指增加旅行的次数。18.B 根据后句内容可知, 这里指往返于目的地带来的压力。

19.C 根据句中the same amount of leave可推断, 这里指如果把长假分三次来休。20.A 根据句中it’s not worth it可推断, 出行的麻烦就变为原来的三倍。Ⅳ.七选五阅读理解 1.A 2.B 3.E 4.F 5.G Ⅴ.短文改错

1.One evening, Helen was preparing her examination in the basement of the house.Her parents had gone out shopping.Suddenly, heard footsteps on the floor.that she was the only person at home, she was frightened.Obviously, a thief has come in through the window that had been left for fresh air.Picking up her courage, Helen took a toy gun from the cupboard and went to upstairs.On her way, she shouted, “George, take the dog out.” To the thief, she turned

some lights.The thief must have heard all the noises rushed out through the window where he came in.Now, Helen felt somewhat relieved.