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必修四 Unit 2 课后作业.单项填空1 _it is to watch Xiao Shenyangs performance! So it is！Everyone present will burst into laughter.AWhat a fun BNo wonderCNo doubt DWhat fun2 What do you think of our manager，Mr.Smith? He is really _ success in his career，but in a way he is _failure in his family.Aa；不填 Bthe；theCa；a D不填；不填3It is_ill health that she is now not so active in the movement.Ainstead of Bin place ofCthanks to Din face of4 Do you regret _up your opinion that every child should take part in service learning? No.On the contrary，I think it is very necessary.Abringing Bto bringCto be brought Dbeing brought5Ever since Dolly，the sheep was cloned in 1997，Westhusins phone _ with people calling in hopes of making the copies of their pets.Ahas rung BrangCwas ringing Dhas been ringing6Nowadays everyone is responsible for _ a harmonious society in China.Amaking up Btaking up Copening up Dbuilding up7The population of Africa is _ so rapidly as to cause concern of the whole world.Aexpanding Bstretching Cextending Dspreading8China has successfully sent up the Shenzhou spacecraft into space _ with sophisticated devices of science and technology.Ato be equipped Bequipped Cequipping Dhaving been equipped9.Youd better go there by train.The train ticket is _ the airplane ticket.Aas cheap three times as Bas three times cheap asCthree times cheaper than Dcheaper three times than10There was a _ look on his face when he met with the _ problem.Aconfusing；confusing Bconfused；confusedCconfusing；confused Dconfused；confusing.完形填空My son was badly hurt in a fire.After he _1_from a series of treatments, the doctors told him they would not do any operation for six months _2_it took long for the skin to stop shrinking(收缩)So, he had to return to college with a visible 10inch_3_on his face.I said to my son，“Keaton, _4_will pay any more attention to your scar _5_you do.If it does not bother you, it will not bother _6_.”He took my advice to heart and returned to school with his head _7_highglad he was alive._8_，everyone has scars and shortcomings.Some of you may spend much time thinking that people would like you better，_9_you looked different, or dressed differently, or could have a different and newer _10_.But you see, like Keatons scar, people will only judge you by your looks, or your _11_，or your car, if you are judging yourself by these same false _12_.One of my friends in college was very _13_.At first, when people met him, they noticed his _14_for about 10 seconds.This man felt _15_about himself and spent most of his time _16_about other peoples comfort and welfare._17_， people ignored his looks.What people _18_was his kindness and his concern for them.He didnt act in an ugly way so people didnt treat him as an ugly man.Therefore, concentrate on what you value _19_yourself, because if you can see that beautiful person, everyone you are in contact with will see the same _20_.1A.curedBrecoveredCimprovedDreturned2A.because Bthough Cuntil Dbefore3A.cut Bwound Cinjury Dscar4A.no one Banyone Ceveryone Dsomeone5A.as Blike Cthan Dwhen6A.another Bothers Call Dus7A.put Bheld Ctaken Dhung8A.After all BIn conclusion CIn fact DAbove all9A.as long as Bif Ceven if Das if10A.house Btelephone Cjob Dcar11A.clothes Bhairstyle Cfigure Dsalary12A.means Bstandards Ccomments Drules13A.smart Boptimistic Crude Dugly14A.manners Bexpressions Clooks Dactions15A.lucky Bworried Cgood Dsad16A.inquiring Basking Cknowing Dcaring17A.Completely BGradually CObviously DSuddenly18A.wanted Bunderstood Cbrought Dsaw19A.within Bbeyond Cexcept Dabove20A.kindness Bconcern Cbeauty Dperfection.阅读理解AIf you travel to a new exhibit at the San Francisco Conservatory of Flowers, you will have chances to see some meateating plants.Take bladderworts (狸藻类植物), a kind of such plant, for example.They appear so small and grow in a quiet pond.“But these are the fastestknown killers of the plant kingdom, able to capture a small insect in 1/50 of a second using a trap door！”Once the trap door closes on the victim, the enzymes (酶) similar to those in the human stomach slowly digest the insect.When dinner is over, the plant opens the trap door and is ready to trap again.Meateating plants grow mostly in wet areas with soil that doesnt offer much food value. In such conditions, these amazing plants have developed insect traps to get their nutritional needs over thousands of years.North America has more such plants than any other continents.Generally speaking, the traps may have attractive appearance to fool the eye, like pitcher plants, which get their name because they look like beautiful pitchers (a container like a bottle) full of nectar (花蜜)The Asian pitcher plant, for example, has bright colors and an attractive halfclosed lid.Curious insects are tempted to come close and take a sip, and then slide down the slippery (光滑的) slope to their deaths.Hairlike growths along the pitcher walls ensure that nothing can escape, and the digestive enzymes can get to work.A tiny insect can be digested in a few hours, but a fly takes a couple of days.Some of these pitchers are large enough to hold two gallons.Meateating plants only eat people in science fiction movies, but sometimes a bird or other small animals will discover that a pitcher plant isnt a good place to get a drink.【解题导语】本文是一篇科普文章，介绍了以动物(主要是昆虫类)为食的食虫草。1From the first paragraph, we learn that bladderworts can_.Akill an insect in a second Bcapture an insect in 1/50 of a secondCbe found floating on a quiet lake Ddigest a fly in a few hours2If the trap door of a meateating plant is closed, the plant is_.Afooling insects into taking a sip Bproducing nectarCtempting insects to come close Denjoying a dinner3Meateating plants can grow in wet and poor soil because they_.Acan get nutrition from animals Bdont need much food valueCcan make the most of such conditions Dhave developed digestive enzymes4What can be captured by meateating plants for food?AA child. BA dog. CA little bird. DA little fish. BHow many things can you see in the night sky？A lot! On a clear night you might see the Moon，some planets，and thousands of sparkling stars.You can see even more with a telescope.And with bigger and bigger telescopes you can see more and more objects in the sky.And you can see those objects in more and more detail.But scientists believe there are some things in the sky that we will never see.We wont see them with the biggest telescope in the world，on the clearest night of the year.Thats because theyre invisible.Theyre the mysterious dead stars called black holes.You might find it hard to imagine that stars die.After all，our Sun is a star.Year after year we see it up in the sky，burning brightly，giving us heat and light.The Sun certainly doesnt seem to be getting old or weak.But stars do burn out and die after billions of years.As a stars gases burn，they give off light and heat.But when the gas runs out，the star stops burning and begins to die.As the star cools，the outer layers of the star pull in toward the center.The star squashes into a smaller and smaller ball.If the star is very small，the star ends up as a cold，dark ball called a black dwarf.If the star is very big，it keeps squashing inward until its packed together tighter than anything in the universe.Imagine if the Earth were crushed until it was the size of a tiny marble.Thats how tightly this dead star，a black hole，is packed.What pulls the star in toward its center with such power？Its the same force that pulls you down when you jumpthe force called gravity.A black hole is so tightly packed that its gravity sucks in everythingeven light.The light from a black hole can never come back to your eyes.Thats why you see nothing but blackness.So next time you stare up at the night sky，remember：theres more in the sky than we can see！Scattered in the silent darkness are black holesthe great mystery of space.【解题导语】每当你抬头仰望天空中闪烁的群星时，你是否知道在广袤的太空中还隐藏着无数我们无法看到的东西黑洞。本文向读者介绍了这些黑洞的形成原因和过程。5According to the article，what causes a star to die?AAs its gases run out，it cools down. BIt has a collision with other stars.CIt can only live for about a million years. DAs it gets hotter and hotter，it explodes.6Which of the following statements is NOT true?ABlack holes are dead stars. BBlack holes have gravity.CBlack holes are invisible. DThere is nothing as mysterious as a black hole.7What happens AFTER a star dies?AIt becomes invisible. BIt falls to the Earth.CIt burns up all of its gases. DIt becomes brighter and easier to see.8.Why cant you see light when you look at a black hole?ABecause most black holes are so far away.BBecause the gravity of a black hole is so strong that it sucks the light inward.CBecause as the stars gases burn，it stops giving off heat and light.DBecause as a star cools，its outer layers pull in toward its center.Keys:.单项填空1解析：选D。考查交际用语。根据Everyone present will burst into laughter可知选D。fun是不可数名词，前面通常不用冠词。No wonder难怪；No doubt肯定地，想必。2解析：选C。考查冠词。success和failure此时都是抽象名词具体化，前面通常要加不定冠词a。a success/failure在此表示“一个成功/失败的人”。3解析：选C。考查短语辨析。thanks to因为，由于。此句用了强调句型It is.that.，强调thanks to ill health。instead of代替，而不是；in place of代替，取代；in face of面对。4解析：选A。考查动词用法。根据答语“不，正相反，我认为它非常有必要”，可知bring up这一动作已发生，故选A。regret doing表示后悔/遗憾做过(已经做过了)；regret to do表示遗憾地要做(还未做)。5解析：选D。考查动词的时态。由该句的时间状语“Ever since Dolly，.in 1997”判断，应用完成时，但ring是瞬间动词，不能与“ever since过去时(间)的时间状语”连用，故用现在完成进行时。6解析：选D。考查动词短语词义辨析。句意：如今在中国每个人都应担负起构建和谐社会的责任。make up表示“弥补”；take up表示“占据，从事”；open up表示“开放，开辟”；build up表示“使强壮，建造”。7解析：选A。考查动词辨析。expand不仅指尺寸的增加，还可指范围和体积的扩大。 stretch一般指由曲变直、由短变长的伸展；extend指空间范围的扩大或长宽的向外延伸，也可指时间的延长；spread一般指向四面八方扩大或传播。8解析：选B。考查过去分词作定语。修饰spacecraft，表示被动和完成。句意：中国成功地发射神舟七号飞船，飞船上配备着精密的科技装置。9. 解析：选C。考查倍数表达法。表达倍数时应把表示倍数的词放在比较级的前面，由此可判断此项正确，此处是“倍数词比较级than”结构。10解析：选D。句意：当他遇到这个使人困惑的问题时，他脸上露出了困惑的表情。.完形填空1. 解析：选B。上一句提到儿子在一次大火中被严重烧伤，由此可知此处应用recover，表示经过一系列治疗，他“康复”了。假如选择A项，应变成被动形式。2解析：选A。本句的前半部分提到医生告诉他六个月内不能再做手术，后半部分解释的是其中的原因，所以空格处表示的是因果关系。3解析：选D。由于暂时无法进行手术，他的脸上有一道十英寸长的清晰可见的“伤疤”。下一段前半部分中的scar也是线索提示。cut表示“伤口”；wound多用来表示刀伤或枪伤；injury多指(对躯体的)伤害，损伤。 4解析：选A。此处是作者在安慰自己的儿子，意在表明如果儿子自己不把伤疤放在心上，“没有人”会留意儿子脸上的伤疤。5解析：选C。根据本句中的more可知是进行比较。6解析：选B。如果儿子自己不会因脸上的伤疤而烦恼，“其他人”也不会把此事放在心上。此处是泛指其他人。7解析：选B。hold ones head high是固定短语，表示“趾高气扬，扬眉吐气”。此处是介词with的复合结构。8解析：选C。此处是作者进行了引申，“事实上”每个人都有伤疤和缺点。after all毕竟；in conclusion在结束时，最后；above all首先，最重要的是，都不符合所给语境。9解析：选B。一些人可能认为“如果”自己的长相、衣着等与众不同，人们就会喜欢自己。as long as只要；even if即使；as if似乎，语意都不恰当。10解析：选D。此处与下一段中的car相呼应。其余选项在文章中没有信息支持。11解析：选A。此处与上一段中的or dressed differently相呼应，由此可判断应选clothes“衣服”。12解析：选B。作者认为仅仅凭借外在因素去评价一个人是错误的评判“标准”。means方法，手段；comments评论；rules规则，均不符合语境。13解析：选D。根据本段最后一句可知作者的这位朋友长相“丑陋”。14解析：选C。由于此人长相丑陋，人们遇到他时自然会长时间地盯着他看，因此looks“外貌”最符合语境。15解析：选C。根据本句后半部分中的内容可知这个人自我感觉“良好”。16解析：选D。虽然这个人长相丑陋，却有一颗善良的心，他用大部分的时间去“关心”别人的舒适和福利。inquire打听；ask询问；know了解，语意都不恰当。17解析：选B。他的善意感动了周围的人，人们“逐渐”忽视了他的相貌。A项表示“彻底”，过于绝对。18解析：选D。上一句提到人们不再过于注意他的相貌，由此可知人们“看”到的是他的善良和对别人的关心。19解析：选A。作者以自己的一个朋友为例，意在表明人的内心比外貌更加重要，所以要注重自己的“内在”价值。20解析：选C。如果你能看到你的内在美，其他与你有接触的人同样可以看到你的“美”。 .阅读理解 A1. 解析：选B。由第一段最后一句话可知B项是正确的。2解析：选D。根据第二段内容“Once the trap door closes on the victim，the enzymes.slowly digest the insect”可知它在消化昆虫，即在享受食物。因此D项符合题意。3解析：选A。根据第三段第二句话可知，这种植物能够生长在这些地方是因为它们以昆虫为食。所以A项正确。4解析：选C。根据文章最后一句话可知，这种植物可能会捕食小鸟。B5解析：选A。细节理解题。文章第六段讲述了其原因。当恒星周围的气体烧尽时，它便停止燃烧然后死亡。6解析：选D。细节理解题。文章只提到黑洞是宇宙中神秘的天体，但并没有说它是最神秘的东西。7解析：选A。推理判断题。从第七、八段的内容可知A项正确。8.Why cant you see light when you look at a black hole?A解析：选B。细节理解题。根据文章倒数第二段中的“A black hole is so tightly packed that its gravity sucks in everythingeven light.The light from a black hole can never come back to your eyes.”(黑洞的密度如此之大，以至于其重力能吸引一切甚至于来自黑洞的光永远无法到达你的眼睛)可知答案。
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