选择性必修 第一册Unit 5 Revealing nature课时训练

这是一份选择性必修 第一册Unit 5 Revealing nature课时训练，共18页。试卷主要包含了5分，满分37等内容，欢迎下载使用。
第一节（共15小题;每小题2.5分，满分37.5分）
阅读下列短文，从每题所给的A、B、C、D四个选项中选 出最佳选项。
A
(2020.浙江杭州高一下检测) A Prtland , Oregn man has traveled acrss Antarctica by himself withut receiving any assistance. Adventurer Clin O’ Brady cmpleted the 1, 500-kilmetre trip in December, 2018. He crssed the cntinent
in 54 days. Friends, family and ther peple fllwed his prgress thrugh messages and pictures he left n scial media. O’ Brady spke with his family by telephne sn after he cmpleted the jurney. “It was an emtinal call,” his wife Jenna Besaw said. “He seemed verwhelmed (充溢) by lve and appreciatin, and he really wanted t say ‘Thank yu’ t all f us.”
O’ Brady dcumented the trip n the scial netwrking service. He called his jurney “The Impssible First”. He wrte that he traveled the last 129 kilmetres in ne big, final push t the finish line. The distance tk ver ne day t cmplete.
O’ Brady wrte, “While the last 32 hurs were sme f the mst challenging hurs f my life, they have quite hnestly been the best mments I have ever experienced.”
The day befre, he wrte that he was “in the zne” and thught he culd make it t the end withut stpping. “I’m listening t my bdy and taking care f the details t keep myself safe,” he wrte. “I called hme and talked t my mm, sister and wife—I prmised them I will stp when I need t.”
Other peple have traveled acrss Antarctica, but they all had sme frm f assistance. They had either better, mre plentiful supplies r devices that helped mve them frward. In 2016, British explrer Henry Wrsley died in his attempt t travel alne acrss Antarctica, unassisted. Wrsley’s friend Luis Rudd is nw attempting an unaided sl jurney in Wrsley’s hnr. He is cmpeting against O’ Brady t be the
first t d it. Besaw tld the Assciated Press that her husband plans t stay n Antarctica until Rudd finishes his trip.
1. Why did Jenna Besaw say “It was an emtinal call”?
A. O’ Brady was grateful fr peple’ s cncern.
B. She was cncerned abut O’ Brady’s safety.
C. O’ Brady was t excited t express his feelings.
D. She was prud f what O’ Brady had accmplished.
2. What can be inferred abut O’ Brady frm the last paragraph?
A. He returned hme after cmpleting the jurney.
B. He defeated Rudd in their cmpetitin.
C. He traveled acrss Antarctica in Wrsley’s hnr.
D. He had sme assistance in the adventure.
3. Which saying can best describe O’ Brady’s success?
A. Unin is strength.
B. Rme was nt built in ne day.
C. Well begun is half dne.
D. Nthing is impssible t a willing mind.
B
(2020.山东烟台高一下检测) Plants cannt run r hide, s they need ther strategies t avid being eaten. Sme curl up their leaves, and thers prduce chemicals t make themselves taste bad if they sense animals drling n them, chewing them up r laying eggs n them—all signals f an attack. New research nw shws sme flra can feel a plant-eating animal well befre it launches an attack, letting a plant prepare a preemptive (先发制人的) defense that even wrks against ther pest species.
When eclgist Jhn Orrck f the University f Wiscnsin-Madisn sprayed snail slime—a liquid the animals release as they slide alng—nt sil, nearby tmat plants appeared t ntice. They increased their levels f an enzyme (酶), which is knwn t prevent plant-eating animals. “Nne f the plants were ever actually attacked,” Orrck says. “We just gave them cues that suggested an attack was cming, and that was enugh t cause big changes in their chemistry.”
Initially Orrck fund this defense wrked against snails; in the latest study, his team measured the slimy warning’s impact n anther ptential threat. The investigatrs fund that hungry caterpillars (毛虫) , which usually eat tmat leaves
greedily, had n appetite fr them after the plants were expsed t snail slime and activated their chemical resistance. This nnspecific defense may be a strategy that benefits the plants by further imprving their verall pssibilities f survival, says
Orrck, wh reprted the results with his clleagues in March in Oeclgia.
The finding that a snail’s apprach can cause a plant respnse that affects a different animal made Richard Karban curius, a plant cmmunicatins expert, wh was nt invlved in the study. “It is significant that the plants are respnding befre being damaged and that these cues are having such far-ranging effects,” Karban says. The research was cmprehensive, he adds, but he wnders hw the tmat plants
felt chemicals in snail slime that never actually tuched them.
“That’s the millin-dllar questin,” Orrck says. He hpes future research will make ut the mechanisms that enable plants t sense these relatively distant cues.
4. Jhn Orrck sprayed a liquid nt sil near tmat plants t ________.
A. make them grw better
B. give them a warning
C. keep plant-eating animals away
D. infrm plant-eating animals f danger
5. Why is the example f “caterpillars” mentined in Paragraph 3?
A. T intrduce anther animal.
B. T cnfirm the result f the study.
C. T appeal t peple t prtect animals.
D. T analyse different resistance chemicals.
6. What des Richard Karban really want t knw?
A. Hw tmat plants becme aware f danger.
B. What the chemicals in the snail slime are.
C. Whether the research is f practical value.
D. What the finding f the research is.
7. What can be a suitable title fr the text?
A. Watchful Plants
B. Greedy Animals
C. A Snail’s Apprach
D. A Defensive Attack
C
(2020.黑龙江哈尔滨高一下测试)The different parts f a health-care system have different fcuses. A hspital’s strke (中风)unit mnitrs bld flw in the brain. The cardiac unit is interested in that same flw，but thrugh and frm the heart. Each cllectin f equipment and data is effective in its wn field. Thus, like the stry f blind men feeling an elephant, mdern health care ffers many separate pictures f a patient, but rarely a useful united ne.
On tp f alt this, the instruments that dctrs use t mnitr health are ften expensive, as is the training required t use them. That cmbined cst is t high fr the medical system t scan regularly, fr early signs f illness, s patients are at risk f heart disease r a strke.
An unusual research prject called AlzEye, run by Mrfields Eye Hspital in Lndn, in cperatin with University Cllege, Lndn (UCL), may change this. It is attempting t use the eye as a windw thrugh which signals abut the health f ther rgans culd be discvered. The dctrs in charge f it, Siegfried Wagner and Pearse Keane, are studying Mrfields’ database f eye scans, which ffers a detailed picture f the health f the retina (视网膜).
The prject will g a step further: With the infrmatin abut ther aspects f patients’ health cllected frm ther hspitals arund England , dctrs will be able t lk fr mre accurate signs f disease thrugh eye scans.
The Mrfields data set has lts f linked cases t wrk with—far mre than any similar prject. Fr instance, the UK Bibank，ne f the wrld’s leading cllectins f medical data abut individual peple, cntains 631 cases f a “majr cardiac adverse event”. The Mrfields data cntain abut 12, 000 such. The Bibank has data n abut 1, 500 strke patients. Mrfields has 11, 900. Fr the disease n which the Mrfields prject will fcus t start with dementia, the data set hlds 15, 100 cases. The nly cmparable study has 86.
Wagner and Keane are searching fr patterns in the eye that shw the emergence f disease elsewhere in the bdy. If such patterns culd be recgnized reliably, the ptential impact wuld be huge.
8. Why des the authr mentin “the stry f blind men feeling an elephant” in Paragraph 1?
A. T claim the ineffectiveness f ur health care system.
B. T tell the similarity in varius health care units.
C. T explain the limitatin f mdern health care.
D. T shw the cmplexity f patients’ pictures.
9. What des the underlined wrd “this” in Paragraph 3 refer t?
A. The challenge f making advanced medical instruments.
B. The high risk f getting a heart disease r a strke.
C. The incnvenience f mdern health care service.
D. The incmplete and expensive health mnitring.
10. Hw des AlzEye wrk?
A. By thrughly examining ne’s bdy rgans.
B. By identifying ne’s state f health thrugh eye scans.
C. By helping dctrs discver ne’s diseases f the eye.
D. By cmparing the eye-scan data frm different hspitals.
11. What can be inferred abut the Mrfields’ prject frm Paragraph 5?
A. It takes advantage f abundantly available medical data.
B. It makes the cllectin f medical data mre cnvenient.
C. It imprves the Mrfields’ cmpetitiveness in the medical field.
D. It strengthens data sharing between the Mrfields and the Bibank.
D
(2020.江苏南通高一下检测)Australian magpies can understand what ther birds are saying t each ther, a new study has fund.
The research, published in the jurnal Animal Behaviur, says the magpie has learned the meanings f different nisy miner calls and essentially eavesdrps (偷听) t find ut which predatrs (捕食者) are near. Nisy miners—a small, native hneyeater—have different warning calls fr grund-based and aerial (空中的) predatrs. By playing bth kinds f recrdings t a series f wild magpies, researchers bserved the magpies raising their beaks (喙)t the sky, r drpping their heads t the grund.
Researchers attracted the magpies with cheese, then played the nisy miner calls, videtaping the results.
As a cntrl, they als rlled a large range ball twards the magpies t see hw they rdinarily tilted (倾斜) their beaks t grund threats, and threw the ball t see hw they reacted t aerial threats.
The researchers recrded an average maximum beak angle f 29 degrees fr the thrwn ball, and an average maximum f nine degrees when it was rlled.
The miners’ aerial warning caused an average maximum beak angle f 31 degrees, and the grund warming caused an average maximum f 24.
One f the study’s authrs, Dminique Ptvin, said the magpies shwed an astnishing level f insight.
Magpies and miners bradly face the same types f predatrs and the tw frequently live in the same ecsystem. Ptvin said this had encuraged the magpies’ learned behaviur.
“Magpies are generally fund n the grund and nisy miners are generally fund up in trees. It pays fr the magpie t pay attentin t smebdy wh has a better view f predatrs than they d.”
She said it was unclear whether ther birds culd d the same, but it was highly likely ther magpies arund Australia already did.
“Magpies are a pretty smart grup. We’re nt sure if they’re learning this frm ther magpies r if they’re figuring it ut n their wn, but the ability is there.”
As part f the experiment, researchers als played a third call: a cmmn, nn-warning call frm a crimsn rsella. They fund the magpies did nt respnd.
Ptvin said that we had been actively explring animal cgnitin (认知) research.“It’s a gd piece f the puzzle,” Ptvin said. “Lking at the scial relatinships between species that live in cmmunities.”
12. What have the researchers fund abut Australian magpies?
A. They can understand ther bird calls.
B. They can cmmunicate with nisy miners.
C. They have a special preference fr cheese.
D. They have the ability t warn the predatrs.
13. Hw did the researchers get their findings?
A. By calculating the beak angles f aerial and grund predatrs.
B. By cmparing the magpie’s and the nisy miner's respnses t threats.
C. By mnitring the magpie’s respnses t the nisy miner’s warning calls.
D. By recrding the magpie’s luder scream fr ther birds’ attentin.
14. The magpies’ cgnitin can help them ________.
A. have a better view f the predatrs than the nisy miners
B. better prtect themselves frm the ptential threats
C. cperate with ther birds t drive away the predatrs
D. live in harmny with ther birds in the same ecsystem
15. We can learn frm the passage that ________.
A. the magpies are smart learners f ther birds’ behaviur
B. It’s likely that ther birds have develped the same ability
C. the findings have clarified the relatinships between species
D. a lt mre remains t be explred abut animal cgnitin
第二节（共5小题;每小题2.5分，满分12.5分）
阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。选项中有两项为多余选项。
(2020.安徽合肥高一下检测) Schls cnsume a large amunt f energy, which has a bad effect n the envirnment. 16 , there are lts f ways that yu can help yur schl save energy. Lk fr simple changes yur schl can make and band tgether with thers t make an even bigger effect.
17 , Even smething as simple as turning ff the lights when yu leave a rm can help save energy. Tum ff the lights in classrms that are nt being used and in ther areas, such as empty bathrms and unccupied multi-purpse rms.
Use natural light when the sun is bright. It may nt always be necessary fr yu t have the lights n in yur classrm. There may be times f day when the sun is especially bright and enugh fr what yu are ding in yur classrm. 18 .
Set up a recycling statin at yur schl. Recycling is a great way t save energy because it reduces the need t prduce new materials. 19 , then ask yur schl principal if yu can set ne up.
Get thers invlved. 20. Either as an individual r as a team, yu can create and put up signs arund yur schl. Try using signs that remind peple f things they can d t save energy and als sme signs that raise awareness f saving energy.
A. Pst signs abut cnserving energy
B. Whether yu are a teacher r a student
C. If yur schl des nt have ne
D. Tum ff yur cmputer when it’s nt used
E. Shut dwn the lights when rms are nt in use
F Other times f day yu might nly need half f the lights
G. If yur schl’s garbage cmpany ffers recycling services
第二部分语言运用（共两节，满分30分）
第一节（共15小题;每小题1分，满分15分）
阅读下面短文，从每题所给 的A、B、C、D四个选项中选出可以填入空白处的最佳选项。
(2020.广东惠州高一下检测)Trees always have attractin fr peple. They are the 21 life frm n ur planet, As a direct link with thusands f years f histry，trees have 22 artists ver the years.
When I was a child I 23 a science fictin stry that made me think abut trees in a new way. In the stry, 24 frm an advanced civilizatin cme t ur planet and their
spaceship 25 in the middle f a frest. The aliens (外星人) have a lng cnversatin with the trees f the frest and then leave, 26 t think that the inhabitants (居民) f Earth arc nble, intelligent and peaceful.
Trees 27 a lt abut being part f a cmmunity and that cperatin is better fr a sciety than 28. Scientists are nly just beginning t understand hw it all 29 , but we knw trees grwing tgether share all f the available resurces with each ther. S, strng trees in a gd 30 will share fd and water with weaker trees that receive less sunlight. By 31 , a cmmunity f trees makes itself strnger. The 32 f giant redwd trees, fr example , grw tgether under the grund as if they are hlding hands. This means that they are 33 strnger when there are heavy winds r flds.
We knw that trees are 34 fr the envirnment and the survival f ur planet. Perhaps they have mre t 35.
21. A. kindest B. ldest C. heaviest D. fittest
22. A. gverned B. spnsred C. inspired D. tricked
23. A. tk in B. came acrss C. set aside D. kept up
24. A. wrkers B. researchers C. visitrs D. invaders
25. A. lands B. drps C. flies D. shts
26. A. curius B. happy C. sad D. grateful
27. A. get B. knw C. affrd D. send
28. A. regulatin B. management C. cmpetitin D. cnstructin
29. A. learns B. ends C. grws D. wrks
30. A. psitin B. manner C. rank D. mdel
31. A. pulling back B. bringing up C. fighting back D. teaming up
32. A. branches B. fruits C. leaves D. rts
33. A. nearly B. reallyC. nlyD. merely
34. A. ppularB. suitableC. vitalD. nrmal
35. A. ffer B. takeC. payD. study
第二节（共10小题;每小题1.5分，满分15分）
阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。
(2020.山东枣庄高一下检测)A few years ag, after a lng mrning f sightseeing in New Yrk, my children and I tk a rest n a park bench in Central Park.
“Lk!” my sn said, 36. ________(pint) t a nearby rubbish bin. That’s when we saw a raccn(浣熊). Quite feeling at hme in the big city, he paid us n attentin,
cncentrating nly n finding a 37. ________(taste) lunch. He srted thrugh a few ptins befre cming ut with a wrapped sandwich 38. ________(hld) between his paws.
39. ________(surprise), rather than run away, he jumped dwn and walked casually t a spt n the path, nt a metre frm 40. ________ we sat. The children were spellbund, as the raccn was prviding better 41. ________(entertain) than any museum. He glanced at us, perhaps checking t see 42. ________ we were abut t steal his lunch.
43. ________ delicate fingers, he peeled back the layer f plastic wrap until the half-eaten sandwich 44. ________(uncver).
Then he surprised us all. Instead f starting eating his fd, he turned t a nearby pl f water and 45. ________(dip) his paws in it. With a casual air, he rubbed his paws tgether underwater fr a mment , brushed his fur , and then started gracefully picking at his meal.
第三部分写作（共两节，满分40分）
第一节（满分15分）
(2020.安徽淮南高一下检测)假定你是红星中学高三学生李华，你的英国好友Jim在你们学校网站上看到了学生参加学农活动的照片,很感兴趣,发来邮件询问。请你给他回复邮件,内容包括:
1.学农活动的相关信息(时间、内容... ;)
2.你参加学农活动的感受。
注意：1.词数80左右;
2.开头和结尾已给出,不计人总词数。
提示词:学农learn frm farmers
Dear Jim,
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yurs,
Li Hua
第二节（满分25分）
(2020.浙江杭州高一下检测)Summer vacatin had just begun, and Alex and Maria were ready t spend all day utside. They decided t walk t the neighbrhd park, where there was a river that they liked t swim in when it was particularly ht.
When they gt t the river, they saw that it was t deep t swim in. Alex and Maria were disappinted. On the ther side f the river , abut fifty yards away, there was a funtain frm which the water was flwing ut. “We shuld g play in the
funtain,” Maria said. “Hw will we get there?” asked Alex.
Maria lked arund the grassy river bank and nticed a few lgs and branches lying clse t the water. “We culd build a bridge!” she said. She ran ver t a thick lg that lked lng enugh t be placed acrss the river. Tgether, she and Alex
lifted the lg nt their shulders and walked it t the water. Here, they stpped. Hw wuld they get the branches acrss?
Maria suggested thrwing it dwn int the water and seeing if it reached the ther side. That seemed imprper t Alex-what if the branches did nt reach the ther side f the river, and gt stuck r swept away by the water? Then they wuld be unable t walk all the way acrss the river.
Maria wndered if they culd measure the distance frm the river bank they std n t the ther shre. They put the lg carefully dwn and decided t test the distance with lighter, thinner branches. They fund a few branches and they tied the
branches tgether using their hair bands.
At their first attempt，they tied tw branches tgether and went back t the river t test the length. The branches nly reached the centre f the water. After tying tw mre branches tgether t the initial branches, Alex and Maria were able t get the thin mdel bridge t tuch the far bank. “Hray!” Maria said. “Nw we knw hw lng the lg needs t be.”
注意:
1.续写词数应为150左右;
2.请按如下格式作答。
They set the tied branches n the grund next t the lg. ___________________ ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Alex and Maria managed t get t the ther side f the river. ________________
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
参考答案及解析
第一部分 阅读
第一节
A
[语篇解读]主题:人与自然(地球与宇宙探索)。话题:探索南极洲。这是一则新闻报道，介绍了美国冒险家Clin O’ Brady在经过54天的跋涉后成功横越南极洲。他成为首个未通过任何援助独自穿越南极洲的人。
1.A 句意理解题。结合第一段中的“Friends, family and ther peple lve and appreciatin..." 可知, O’ Brady成功穿越南极洲后打电话向家人报喜,他妻子认为这个电话是充满感情的,因为她体会到了丈夫对所有关注他的人的感激。
2. B细节理解题。根据最后一段中的“Luis stay n Antarctica until Rudd finishes his trip."可知, O’ Brady在完成这段旅程后将在南极洲等待Rudd完成他的旅程，由此可知，在他们两个，人的这场比赛中, O’ Brady战胜了Rudd。
3. D推理判断题。美国冒险家O’ Brady不畏艰难,历时54天成功横越南极洲，独自完成了总长1500千米的冒险旅程,他的成功印证了“有志者事竞成”这一格言,与D项表达吻合。
B
[语篇解读]主题:人与自然(自然生态)。话题:植物自我保护。本文是一篇说明文，文章介绍了一项新的科学研究。研究表明植物.会对外在威胁相当警觉,会自动作出反应进行自我保护。
4.B推理判断题。根据第二段最后一句可推知,Jhn Orrck在西红柿植株附近的泥土上喷洒液体的目的是给予植物一种警告,让它们能够产生自我保护性反应，且其与第三段第一句中的“his team measured the slimy warning’s impact n anther ptential threat”呼应,故选B。
5. B推理判断题。根据第三段第一句“Initially Orrck fund this defense wrked against snails; in the latest study , his team measured the slimy warning’s impact n anther ptential threat.”可推知，文章中提到毛虫的例子是为了验证研究的结果，故选B。
6.A推理判断题。根据第四段最后一句并结合最后一段可推知，Richard Karban实际上想了解的是西红柿植株是如何意识到危险的,故选A。
7.A标题归纳题。根据文章中的关键词plant,并结合对全文的整体理解可推知，本文主要讲述的是有关植物的科学研究,研究发现植物有对外在威胁或攻击的自我保护性反应,故选A。
C
[语篇解读]主题:人与社会(科学与技术)。话题:通过眼睛扫描信息发现疾病。本文是一篇说明文。文章介绍了一个试图通过眼睛扫描信息来发现疾病早期迹象的研究项目。
8. C推理判断题。根据第一段中的“mdern health care ffers many separate pictures.. .rarely a useful united ne”可知，盲人摸象的例子是为了解释现代医疗检查很少能全面地提供患者的整体情况，因此具有局限性。
9. D代词指代题。前两段主要讲了现代医疗检查的局限性以及高昂的费用,而一项不同寻常的研究项目AlzEye也许能改变这一现状。故D项正确。
10. B细节理解题。根据第三段中的“It is attempting t use the f ther ”及第四段可知，AlzEye的工作模式是通过眼部扫描来辨别一个人的健康状况。
11.A推理判断题。根据第五段列举的数据信息可知,Mrfields的项目和同类项目相比,充分利用了更多现存的数据。
D
[语篇解读]主题:人与自然(自然生态)。话题:喜鹊的能力。本文是一篇说明文,文章介绍了一项研究发现，澳大利亚喜鹊能理解其他鸟类的交谈，而关于动物的认知能力还有待于人类进一步探索。
12.A细节理解题。根据第一段和第二段中的“the magpie has learned the meanings f different nisy miner calls”可知，喜鹊能理解其他鸟类的叫声。
13.C细节理解题。在第四段至第七段中,研究人员通过定量研究，先研究喜鹊平时的喙是怎么倾斜的，再对有黑额矿吸蜜鸟叫声的时候喜鹊的反应进行监控、对比,进而获得了研究结果。
14. B细节理解题。根据倒数第五段第二句“It pays fr the magpie t pay attentin t smebdy wh has a better view f predatrs than they d.”可知,喜鹊关注能够更好地观察捕食者的黑额矿吸蜜鸟有利于保护自身的安全。所以喜鹊的认知能力能更好地保护其免受潜在的威胁。
15. D推理判断题。根据最后一段内容，尤其是“Ptvin said that we had been actively explring animal cgnitin research. It’s a gd piece f the puzzle,’Ptvin said.”可知人类一直都在探索动物的认知能力。由此可知对于动物的认知能力,仍然需要进一步探索。
第二节
[语篇解读]主题:人与自然(环境保护)。话题:保护环境。本文是一篇说明文，从四个方面阐述了我们在校园中如何节约能源、保护环境。
16.B关联逻辑法解题。根据句子的结构判断,空格处是一个从句，七个选项中只有B、C和G三个选项符合要求。根据语境可知，此处表示“不管你是老师还是学生,总有许多可以帮助你们学校节约能源的方法”。故答案为B。
17.E.设题位置法解题。本段主要介绍在离开教室等地方的时候关灯以便节约能源。本段中的“turning ff the lights”“Turn ff the lights”等也提示答案为E。
18. F关联逻辑法解题。本段主要介绍当教室内光线充足时使用自然光。空前句子中的times f day与F项中的Other times f day相对应,故选F。
19.C关联逻辑法解题。本段介绍在学校内设立回收站(回收可循环使用的材料)。C选项中的ne指代主题句中的a recycling statin。
20. A 词汇锁定法解题。根据下文的提示“put up signs”“using signs”“sme signs”可以判断答案为A。
第二部分 语言运用
第一节
[语篇解读]主题:人与自然(人与植物)。话题:树木。本文是一篇说明文。主要介绍了树木总是能吸引人们，它们古老而又美丽,是艺术家们的灵感来源，树木之间的团结协作使它们更加强大。此外树木对环境和地球的生存都极其重要。
21. B下文语境题。根据空后的thusands f years f histry并结合选项可知，树木是地球上最古老的(ldest)生命形式。故选B。
22. C上下文语境题。根据语境可知,树木与成千.上万年的历史有直接的联系，它们赋予艺术家们灵感( inspired)。C项意为“赋予灵感”，故选C。A项意为“统治”;B项意为“赞助”;D项意为“欺骗”。
23. B下文语境题。根据空后的a science fictin stry可知，“我”小时候偶然(came acrss)读到一篇科幻故事。B项意为“偶然发现",故选B。A项意为“吸人，理解”;C项意为“留出”;D项意为“保持，继续”。
24. C下文语境题。根据下文中的“an advanced civilizatin” “ their spaceship”以及“The aliens”可知，这里表示的是来自先进文明的访客(visitrs) 。invader 意为“侵略者”,应排除。
25. A上下文语境题。根据上题的解析以及空后的“in the middle f a frest” 可知,外来的宇宙飞船降落( lands )在森林中间。
26. B下文语境题。根据下文中的nble , intelligent and peaceful并结合选项可以推测出那些外星人在离开时，应该是高兴的(happy)。故选B。
27.B.下文语境题。根据下文中的“trees grwing tgether share all f the available resurces”可知,树木在生长的过程中,会分享所有可以得到的资源。由此可以推测出,树木知道(knw)自己是整个群体的一部分, 并且知道合作比竞争(cmpetitin )对一个群体更好。
28. C.上文语境题。 参见上题解析。
29. D上下文语境题。根据语境可知，这里表示科学家才刚刚开始去了解树木之间的合作是怎样运作( wrks)的。
30. A下文语境题。根据空后的“that receive less sunlight”可知,强壮的树木所处的位置(psitin)应该是好的。故选A。C项意为“等级，排列”。
31. D上文语境题。根据.上文中的“being part f a cmmunity”“cperatin”以及“share”可推知,此处表示通过合作( team up)，整个树木群体就会使自己变得更加强大。A项意为“撤退”;B项意为“提出，养育”;C项意为“还击,抑制住”。
32.D.上下文语境题。根据该句中的“grw tgether under the grund”可知，这里表示的是树根(rts)。故选D。
33.B.上下文语境题。根据上题的解析可知,因为树木互相协作、分享资源，并且树根也相互缠绕生长,这样就使得整个群体面对强风或洪水时真的(really )更加强大了。故选B。
34. C上下文语境题。根据语境并结合常识可知，树木对环境和地球的生存都至关重要(vital)。
35. A上下文语境题。根据语境可知,树木已经为人类做出了巨大的贡献，也许未来它们会提供给(ffer)我们更多的东西。故选A.
[语篇解读]主题:人与自然(人与动物)。话题:遇见一只浣熊。本文是一篇记叙文,主要讲述了作者与孩子们几年前遇见一只浣熊的经历。
36.pinting考查非谓语动词。分析句子结构可知,动词pint与句子的谓语动词said之间没有连词,且逻辑主语my sn与pint之间是主动关系,所以用现在分词形式作状语。
37.tasty考查词形转换。此处修饰名词lunch,需用其形容词形式，所以填tasty“美味的”。
38.held考查非谓语动词。根据语境并分析句子结构可知,逻辑主语a wrapped sandwich与hld之间是被动关系,故此处应用其过去分词形式。
39. Surprisingly考查副词。 句意:令人吃惊的是,他没有跑开,而是跳下来然后漫不经心地走到路上的-一个地点，离我们坐的地方不到一米。根据句意可知,此处应用副词surprisingly修饰整个句子。
40. where考查宾语从句。 句意参见上题解析。根据句意并结合句子结构可知,此处应用where引导宾语从句,作介词frm的宾语。
41. entertainment考查名词。根据空前的better 可推知,此处应填其名词形式entertainment,意为“娱乐”,是不可数名词。
42.if/whether考查名词性从句。句意:他看了我们一眼,也许是想察看我们是否打算偷他的午餐。根据空前的see,并结合句意可知，此处应用if/whether“是否”引导宾语从句，作及物动词see的宾语。
43.With考查介词。根据句意并分析句子结构可知,此处在句中作状语,意为“用”,故填With。
44.was uncvered考查动词的时态和语态。句意:他用纤细的手指剥去塑料包装层，直到吃了一半的三明治露了出来。根据该句中的peeled back可知，此处应用一般过去时;且sandwich与uncver之间是被动关系,故此处用一般过去时的被动语态。
45. dipped考查动词的时态。通读全文可知,本文叙述的是发生在过去的事情，且根据空前的turned t和并列连词and可知，此处用一般过去时。
第三部分 写作
第一节
One pssible versin:
Dear Jim,
Knwing that yu are interested in the phts I psted n the schl website, I’m glad t tell yu abut them.
It is last Saturday that ur schl rganized a “Learning frm Farmers” activity. My classmates and I went t a farm in nrthern Beijing where we helped the farmers pick apples the whle day.
I am very happy because I wrked and helped the farmers. And I learned fr the first time f the difficulty getting fruits nt the kitchen table.
Best wishes!
Yurs,
Li Hua
第二节
One pssible versin:
They set the tied branches n the grund next t the lg. The lg was luckily the exact length f the tied branches. Alex and Maria were very happy and they placed the lg acrss the river. Then they fixed their side f the lg with branches and rcks befre they walked acrss it t reach the ther side f the river.
Alex and Maria managed t get t the ther side f the river. When they gt there，they secured the ther side f the lg with branches and rcks, t, and lked back at their handiwrk. It had been a gd day’s wrk , and they were indeed prud f that. They really felt pleased because they finally succeeded in slving the prblem by using their intelligence. Nw they were free t enjy the cl water in the funtain.