(完整版)2019-2020年高三高考模擬考試生物試題含答案

1、桂林中學(xué)XX全程模擬考試生物試題（考試時(shí)間 15 0 分鐘）第I卷（選擇題本卷共 21 小題，每小題 6 分，共 126 分）可能需要的相對(duì)原子質(zhì)量：Na :23 Cu: 64 Mg: 24 O: 16 N :14 C:12 H:1Cl: 35-5S:32 Fe： 56 Br: 80一選擇題（共 13 小題，每小題只有一個(gè)答案符合題意，每小題 6 分，共 78 分）1在動(dòng)物細(xì)胞的物質(zhì)運(yùn)輸中，屬于自由擴(kuò)散的是A.紅細(xì)胞中的 Na+進(jìn)入血漿 B.細(xì)胞外液中的。2進(jìn)入肌細(xì)胞C.細(xì)胞外液中的 K+進(jìn)入神經(jīng)細(xì)胞D.血漿中的碘進(jìn)入甲狀腺細(xì)胞 2.下列關(guān)于葉綠體和線粒體的敘述，正確的是A. 線粒體和葉綠體均

2、含有少量的DNAB. 葉綠體在光下和黑暗中均能合成ATPC. 細(xì)胞生命活動(dòng)所需的 ATP 均來自線粒體D. 線粒體基質(zhì)和葉綠體基質(zhì)所含酶的種類相同3 植物組織培養(yǎng)依據(jù)的原理、培養(yǎng)過程的順序及誘導(dǎo)的植物激素分別是（）。體細(xì)胞的全能性 細(xì)胞膜的流動(dòng)性 根、芽 生長素和細(xì)胞分裂素 生長素和乙烯愈傷組織再分化脫分化 植物體離體的植物器官、組織或細(xì)胞A.，B.，C.，D.，4.以槍烏賊的粗大神經(jīng)纖維做材料，測(cè)定其受刺激后的電位變化過程。圖中箭頭表示電流 方向，下列說法錯(cuò)誤的是（）。abHbaba1234A. 在 a 點(diǎn)左側(cè)刺激，依次看到的現(xiàn)象的順序是B. 在 b 點(diǎn)右側(cè)刺激，依次看到的現(xiàn)象的順序是C.在

3、 a、b 兩點(diǎn)中央刺激，依次看到的現(xiàn)象的順序是4、1、4D.在 a、b 兩點(diǎn)中央偏左刺激，依次看到的現(xiàn)象的順序是4、3、4、2、45.如圖為生態(tài)系統(tǒng)結(jié)構(gòu)的關(guān)系圖，a 代表的成分是A. 生產(chǎn)者B. 消費(fèi)者C. 分解者4、2、4、3、44、 3、4、2、4D .不能確定2019-2020 年高三高考模擬考試生物試題含答案注意事項(xiàng)：1、 請(qǐng)用黑色的簽字筆、鋼筆或圓珠筆直接在各科答題卷上作答。2、 解答時(shí)寫出必要的文字說明、方程式和重要的演算步驟。只寫出最后答案的 不能得分有數(shù)值計(jì)算的題，答案中必須明確寫出數(shù)值和單位.31.對(duì)豆科作物進(jìn)行根瘤菌拌種，是提高豆科作物產(chǎn)量的一項(xiàng)有效措施。科學(xué)研究發(fā)現(xiàn)根瘤菌

4、的固氮反應(yīng)能產(chǎn)生氫氣，氫氧化細(xì)菌要依賴氫氣而生存，豆科作物產(chǎn)量的提高與土壤中的氫氧化細(xì)菌有直接關(guān)系。為探究其中的奧秘，人們進(jìn)行了如下實(shí)驗(yàn)。（每空 2 分，共 10 分）材料用具：在完全培養(yǎng)液（無菌處理）中培養(yǎng)的大豆和小麥幼苗若干、滅菌土壤、純化的根 瘤菌、純化的氫氧化細(xì)菌、收集土壤中氫氣的專用設(shè)備。實(shí)驗(yàn)方案及結(jié)果如下表（空氣擴(kuò)散到土壤中的氫氣忽略不計(jì)）：組別植物種植基質(zhì)檢測(cè)氫氣根系平均生長量（克）甲大豆火菌土壤+根瘤菌有50乙火菌土壤+根瘤菌+ 氫氧化細(xì)菌無75丙小麥火菌土壤+根瘤菌無20丁火菌土壤+根瘤菌+ 氫氧化細(xì)菌無20（1）_乙組未檢測(cè)到氫氣的原因是根瘤菌固氮反應(yīng)產(chǎn)生的氫氣被 _ 吸收

5、利用。（2）_丙組未檢測(cè)到氫氣的原因是根瘤菌不能與小麥 _而發(fā)生固氮反應(yīng)產(chǎn)生氫氣，這個(gè)結(jié)論是通過 _ 組的比較而得出的。通過甲、乙兩組的實(shí)驗(yàn)結(jié)果比較可知：氫氧化細(xì)菌能 _ 。（4）有同學(xué)認(rèn)為通過丙、丁兩組比較可以肯定氫氧化細(xì)菌對(duì)小麥根系的生長沒有任何作用。 他認(rèn)為這是因?yàn)槎〗M的氫氧化細(xì)菌在_的環(huán)境中不能生存。32.人類紅綠色盲的基因位于 X 染色體上用 A、 aBBBbbbHi【1溶孫頂王色盲玄霸豐畫色盲女圈飾色盲男B禿頂哲盲男 Ozm?1表示，禿頂?shù)幕蛭挥诔Ｈ旧w上用 B、b 表 示，結(jié)合下表信息進(jìn)行分析（每空 2 分，共 12 分）男.非禿頂禿頂禿頂女非禿頂非禿頂禿頂(1)_i-2 的基

6、因型為 _,n-2 基因型為。(2)n-1 的色盲致病基因來自第一代的那個(gè)個(gè)體？ _(3 )如果可以通過性別來判斷一個(gè)嬰兒成年后是否禿頂，那么嬰兒父母的表現(xiàn)型為_。(4)n-1 和n-2 結(jié)婚，他們生一個(gè)男孩既是禿頂又是色盲的概率為 _生一個(gè)禿頂女孩的概率為 _。33.如圖表示人體部分特異性免疫過程的示意圖，a、b、c 表示細(xì)胞。請(qǐng)據(jù)圖回答問題。(每空 2 分，共 12 分)(1) 該特異性免疫屬于 _ 免疫，圖中 b 細(xì)胞在人體內(nèi)可以來自 _ 細(xì)胞。(2) 圖中 a、b、c、d 能夠識(shí)別抗原的是 _。(3) 若圖中所示的抗原為釀膿鏈球菌，因其表面的抗原決定簇與人心臟瓣膜上的一種物質(zhì)的表面結(jié)構(gòu)

7、十分相似，物質(zhì) d 向心臟瓣膜發(fā)起進(jìn)攻，使人患上風(fēng)濕性心臟病，這屬于免 疫失調(diào)中的_ _病。(4) 當(dāng)抗原經(jīng)過過程時(shí)，人體內(nèi)產(chǎn)生 d 的主要特點(diǎn)是_ (限十字內(nèi)，每超兩字扣一分，扣完為止)。(5) 研究發(fā)現(xiàn)，SARS 病毒的增殖需要逆轉(zhuǎn)錄酶，從遺傳物質(zhì)分析，研究SARS 疫苗比較困難的主要原因是_34.如表所示為生物學(xué)工作者收集到的某市某湖區(qū)幾種生物的食物網(wǎng)關(guān)系(表示存在食物關(guān)系)。請(qǐng)據(jù)表和圖回答問題。(每空 1 分，共 8 分)、 、 被食者 捕食者綠藻螺螄水草鯽魚輪蟲螺螄VV鯽魚VVVV輪蟲(1) 此生態(tài)系統(tǒng)中共有 _條食物鏈，在該食物網(wǎng)中鯽魚占有 _ 個(gè)營養(yǎng)級(jí)。(2) 若由于某種原因螺螄

8、全部死亡， 輪蟲的種群數(shù)量在短時(shí)間內(nèi)將 _ ，該湖泊生態(tài)系統(tǒng)的抵抗力穩(wěn)定性將 _。1112(3) 假如鯽魚的食物有-來自輪蟲，-來自螺螄，匚來自水草，-來自綠藻，能量流動(dòng)效率按555510%十算，該鯽魚增重 2 kg 需消耗綠色植物 _kg。(4) 雞糞是優(yōu)良的魚類飼料， 適量的投入可以給魚提供食物，從而提高魚的產(chǎn)量。 雞糞中的碳元素只能以 _形式流向魚。向河流中少量投入雞糞對(duì)生態(tài)系統(tǒng)不產(chǎn)生明顯的影響，這是因?yàn)樵撋鷳B(tài)系統(tǒng)具有 _ ;如果投入雞糞過多，將導(dǎo)致浮游植物大量增殖引起水體富營養(yǎng)化，導(dǎo)致水體富營養(yǎng)化的直接原因是雞糞分解產(chǎn)生_。生物參考答案:1. B2.A3.A4.D5.B31.( 1)氫

9、氧化細(xì)菌(2)共生(3)吸收根瘤菌固氮反應(yīng)產(chǎn)生的氫氣，并能促進(jìn)豆科植物根系的生長(4)沒有氫氣(4)數(shù)量多、速率快(5)SARS 病毒的遺傳物質(zhì)是 RNA, RNA 結(jié)構(gòu)不穩(wěn)定，變異頻率高34.答案 (1)52減少降低 (3)92(4)有機(jī)物 一定的自我調(diào)節(jié)能力 N P 等元素2019-2020 年高三高考模擬考試英語試題含答案第一部分聽力(共兩節(jié)，滿分 30 分)做題時(shí)，先將答案標(biāo)在試卷上。錄音內(nèi)容結(jié)束后，你將有兩分鐘的時(shí)間將試卷上的答案 轉(zhuǎn)涂到答題卡上。第一部分聽力(共兩節(jié)，滿分 30 分)做題時(shí)，先將答案標(biāo)在試卷上。錄音內(nèi)容結(jié)束后，你將有兩分鐘的時(shí)間將試卷上的答案 轉(zhuǎn)涂到答題卡上。第一節(jié)

10、(共 5 小題；每小題 1.5 分，滿分 7.5 分)聽下面 5 段對(duì)話。每段對(duì)話后有一個(gè)小題，從題中所給的A、B C 三個(gè)選項(xiàng)中選出最佳選項(xiàng)，并標(biāo)在試卷的相應(yīng)位置。聽完每段對(duì)話后，你都有10 秒鐘的時(shí)間來回答有關(guān)小題和閱讀下一小題。每段對(duì)話僅讀一遍。1. Where are the speakers?A. At home.B. At a tailor SC. At a clothes store.2. Where will the speakers meet?A. At the entrance of the park.甲與丙32.(1) BBXaYBBXAXO5或BbXAXO5(2)1-1

11、(3)非禿頂男性與禿頂女性(4)5/161/1633. (1)體液 B 細(xì)胞和記憶 B(2)a、c、(3)自身免疫B. At the ice-cream shop.C. In the bank.3. What does the man think of the ceremony?A. Noisy. B. Exciting. C. Boring.4. Why is there no paper?A. The man used it up.B. The woman forgot to order.C. The other department took some.5. What is Emily

12、going to do?A. Prepare a report.B. Cook fish.C. Have lunch with Linda.第二節(jié) （共 15 小題；每小題 1.5 分，滿分 22.5 分 ）聽下面 5 段對(duì)話或獨(dú)白。每段對(duì)話或獨(dú)白后有幾個(gè)小題，從每題所給的A、B、C 三個(gè)選項(xiàng)中選出最佳選項(xiàng)， 并標(biāo)在試卷的相應(yīng)位置。 聽每段對(duì)話或獨(dú)白前， 你將有時(shí)間閱讀各個(gè)小題， 每小題 5 秒鐘；聽完后，各小題將給出 5 秒鐘的作答時(shí)間。每段對(duì)話或獨(dú)白讀兩遍。 聽第 6 段材料，回答第 6 至 7 題。6. What does the man think of the job at firs

13、t?A. Interesting. B. Challenging. C. Dangerous.7. What does the man decide to do finally?A. Ask for a high salary. B. Accept the job. C. Find another job. 聽第 7 段材料，回答第 8 至第 9 題。8. Who will be surprised this evening? A. Lily. B. Maggie. C. Jack.9.What is the man going to do this evening?A. Go to the

14、store.B. Attend a party.聽第 8 段材料，回答第 10 至第 12 題。10. Who is calling?11. What day is it today?A. July 3rd.B. July 5thC. July 8th12. What is the message about?A. A meeting. B. A sick leave.C. A visit to the Culture Centre.聽第 9 段材料，回答第 13 至第 16 題。13. What are the special boards used for?A. Keeping sunsh

15、ine out.B. Producing energy. C. Covering buildings.14.What is on the roofs of the buildings?A. The puter centers.B. The working stations.C. The gardens.15. How will Molly go back home today?A. By car.B. By train. C. By bike.16. What kind of zone is BedZED?A. A zone causing no harm to the environment

16、.B. A zone with poor public transportation.C. A zone with low-salary residents. 聽第 10 段材料，回答第 17 至第 20 題。17. What can be clearly affected if teenagers lack sleep?A. Their long term health. B. Their change of spirits. C. Their performance at school.18. What does the man say is to blame for teenagers

17、not getting enough sleep?A. Poor diet.B. Lack of exercise.C. Too much play.19. What advice does the man give for teenagers who have trouble getting to sleep?A. Listen to music.B. Read a book.C. Drink hot chocolate.20. What does the man suggest schools should do?A. Start lessons later. B. Shorten the

18、 school day. C. Offer classes in the evenings.第二部分 英語知識(shí)運(yùn)用 （共C. Make cakes.A. Mrs Bell.B. Mary Smith.C. Jacob Waters.兩節(jié), 滿分 45 分） 第一節(jié) 單項(xiàng)填空 （共 15 小題；每小題 1 分，滿分 15 分）請(qǐng)認(rèn)真閱讀下面各題，從題中所給的A、B、C、D 四個(gè)選項(xiàng)中，選出最佳選項(xiàng)，并在答題卡上將該項(xiàng)涂黑。21. -Of the two apples , which one do you prefer ?-_ bigger one. It sm_o_s_t_d_elicious

19、one , I think .A.The,a B.A, / C.The, the D.A, the22. - Can you e to attend our party tonight?- sorry, but I do wish I _.A. had B. can C. will D. could23. - You don t go to that supermarket quite often, do you?-No, I only go there _ because it s too far away from my house.A. eventually B. constantlyC

20、. occasionallyD. frequently24. - Youve made great progress in your studies of English, havent you?- Yes, but much _ . .A. remains to doB. is remained to doC. remains to be doneD. is remained to be done25._ getting up early, he woke up early every day.A. Using to B. Accustoming to C. Being used toD.

21、Accustomed to26. Professor Wu is a teacher respected by all of us, who always _ new teaching methods toimprove our English.A. wears outB. tries outC. takes out D. puts out27. What makes telling the truth harder than lying is _ truth requires research and facts,_ lies need none.A. what; when B. that;

22、 while C. that; while D. what; but28. Canada Post issued two stamps on Jan. 8, xx, _ the Chinese Lunar Year of the Rabbit.A. in favor of B. in terms of C. in celebration of D. in need of29._ , as long as I m with nature, I don t care.A. However tough the journey isB. Whatever tough the journey isC.

23、However the journey is toughD. Whatever the journey is tough30. -We_ the game. You spoiled the chance by missing the ball!-Im terribly sorry!A. could winB. would winC. could have won D. must have won31. I_ along the street looking for a place to park when the accident_ .A. went; was occurringB. went

24、; was occurredC. was going; occurredD. was going; had occurred32. Tom s fame has spread well_ the walls of his college.A. across B. throughC. bey ondD. over33. -I could nt sleep. I coun ted sheep, I drank milk etc, but nothing helped.-It seems you_ too much lately. Try some sleep ing pills.A. worked

25、B. workC. had workedD. have bee n work ing34. Australia is a sport ing n ati on,_ you can feel their absolute love for sport.A. the one thatB. one whereC. the one whereD. it where35. - You cant finish the book in less tha n an hour, I suppose?A. Yes, Im sure I canB. No, hardly C. Sorry, I ca ntD. I

26、dont thi nk Ican第二節(jié) 完形填空（共 20 小題，每題 1.5 分，滿分 30 分）請(qǐng)認(rèn)真閱讀下面短文，從短文后各題所給的A、B、C、D 四個(gè)選項(xiàng)中，選出最佳選項(xiàng)，并在答題卡上將該項(xiàng)涂黑。Wings of An gelI used to hate myself because I was n t no rmal Every one else could play on the mon key bars and ride on a bicycle,but not _36 . I had a severe spinal cord disorder（ 脊髓病）and I knew I

27、 would always be much _37 than others.I hated going to school and I hated _38_ at myself. I hated see ing others smili ng broadly and sta nding _39_ andtall. And most of all, I hated look ing in the _40_ and see ing an ugly and hun chback（駝背）.My friends found me _41_ because I didn t let others get

28、close to me. I thought I was going to go on like this for therest of my life_42_ An gela appeared.That afternoon, I was sitt ing by myself in a corner of the schoola spot where no one would_43_ me. That s when I first hearelr voice.“ Hi. Can I sit down? ”I raised my head and there she was, with an i

29、rresistible smile on her round face. “ What are you looking at? Sheasked.Ants.What are they doing?No 44I bet they re playing games and make friends. Don t you think so? ”That was how our_45_started and it didn t stop. We talked about everything under thesunthe an ts, the clouds, my little n iche（ 處境

30、）一 un til it was sun set.Then sudde nly, she saw my_46_ . She just stared.My heart _47. What I feared most had happe ned and I knew for sure she would _48 me now.She stood up, pointed at my back and said, I youpwback49hunched. ”I closed my eyes like a criminal waiting to be _ 50_ . I begged in my he

31、art for herto _51_, but she just kept on going. I know what you ve got in there. Do you?No, ” I answered_ 2_She bent and whispered in my ears. Youback is bunched because you vgot a pair of wings from the an gels. ”I was _53_. I looked into her eyes and her _54_ touched my heart. From that day on, Is

32、tarted to lear n to_ 55_ myself because I have the wi ngs of an an gel and a ki nd heartedfriend.36 AthemB itCmeD her37 A sadderBshorterCweakerDslower38 AlookingBsmilingCaimingDglaring39AstillBaloneCstraightDtogether40 AstreetBsunCcornerDmirror41 AdistantBstubbornChopelessD unfortunate42 AafterBbefo

33、reCsinceDuntil43 AdisturbBseekCinterruptDignore44 AwonderBideaCsignD action45 AconnectionBpetitionCconversationDprehension46 AfaceBbackCeyesDshoulders47 A sankBbeatCbrokeD ached48 Acare forB rely onClook down uponD put up with49 AthatBhowCwhetherDwhy50 AaccusedBarrestedCpunishedDsentenced51 ArelaxBl

34、eaveCstopDpause52 AshylyBweaklyCproudlyDfirmly53 AastonishedBashamedCannoyedDamused54 AwisdomBgenerosityChonestyDkindness55 AcontrolBlikeCfortDenjoy第三部分 閱讀理解 （共 20 小題；每小題 2 分，滿分 40 分）請(qǐng)認(rèn)真閱讀下列短文，從短文后各題所給的A、 B、C、D 四個(gè)選項(xiàng)中，選出最佳選項(xiàng)，并在答題卡上將該項(xiàng)涂黑。AJeremy Wirick, 9, has been back in school for less than two mon

35、ths, but he has already had several asthma（ 哮喘attacks. A recent attack happened on October 2, after he pushed himself too hard in gym class. Running, power walking,jogging and push-ups took their toll. When Jeremy got home an hour or two later, he was out of breath. He needed to use anebulizer, a ma

36、chine that helps send medicine quickly to the lungs, to get his breathing back to normal.Asthma attacks like Jeremy increase in September and October. More than six times as many asthma sufferers whoare elementary-school age need hospital treatment in the fall as in the summer.Experts believe many f

37、actors can contribute to back-to-school asthma. Kids get together in close spaces, they startpassing viruses around. A viral infection can cause an asthma attack. There are also certain fall allergies（ 過敏癥 ）that cancause attacks. Exercise is another mon cause of an attack. Besides, the stress of sch

38、ool can make asthma worse.Parents can play a big role in helping kids with asthma start the school year right. Dawne Gee s1-y0ear-old son,Alexander, has had asthma since he was a baby. Before the school year starts, she tells school workers in writing about herson s asthma.The Gees live in Kentucky,

39、 which has passed laws allowing students to carry their asthma medication（藥物治療）withthem at school. Alexander s mom makes sure he has his inhaler（人工 呼吸器 )with him when he goes to school and thathe keeps it on hand at all times. In Delaware, where Jeremy lives, kids are allowed to carry their inhalers

40、 at school.The American Lung Association says that about 6.2 million American children suffer from asthma. Asthma is thechronic ( 慢性 ) illness that causes students to miss the most days of school. There are many things that schools can do tohelp students control their asthma.56. The passage mainly d

41、eals with _ .A. how to prevent and treat Asthma.B. what Asthma is and its symptomsC. the side-effects Asthma has on kidsD. the causes of Asthma and its treatment57. By saying “Running, power walking, jogging and push-ups took their toll. (P”aragraph1) the writer means that.A. physical exercise affec

42、ted their healthB. physical exercise gave them a deep thoughtC. asthma attacks made them like physical exerciseD. asthma attacks could be cured through physical exercise58. Which of the following statements is NOT supported by the passage?A. Kids are likely to suffer asthma attacks in the fallB. Str

43、ess can add to the risk of asthma attacksC. Medical officials should be blamed for asthma attacksD. Asthma attacks will need necessary medical treatment59._ The following paragraph is probably going to talk about_.A. tips on asthma for schoolsB. a survey on students with asthmaC. the effects asthma

44、has on studentsD. further understanding of AsthmaBBoston: On Saturday, millions of people around the world will celebrate Saint Patricks Day, which honors Patron Saint(or main religious figure) of Ireland. munities across the United States will host parades, parties, and other festivities to markthe

45、 occasion.This year, cities like Boston, New York, and Chicago have organized massive events celebrating Saint Patricks Day. InNew York City, hundreds of thousands of people will gather to watch the Saint Patrick s Day parade the nation slargest. It is one of the most watched paradesin the world. La

46、st year, almost 2 million spectators and more than 150,000 participants filled the streets. The parade, first heldin 1776, is also one of the oldest.Chicago also throws a big celebration. Every year the Chicago River, which crosses the city, glows green as eventorganizers dump about 40 pounds of flu

47、orescence, a powerful dye(染料 ),into the water.Boston keeps its parade rolling for three hours or more. It is the nation sescond-largest parade. The city will also saluteone of its most famous former residents, President John F. Kennedy, by opening the exhibit A Journey Home: John F.Kennedy and Irela

48、nd, at his official library.Patron Saint lived in Britain in the early fifth century, when it was still part of the Roman Empire. He was captured andsold into slavery in Ireland when he was only 16 He eventuallyescaped slavery and turned to a life of religious devotion. He trained to bee a minister

49、and set out to spread Christianitythroughout Ireland. After 30 years as a religious leader, Patrick died on March 17, 1461 Saint Patricks Day is alwayscelebrated on MarchIn1I7reland, it is an officialholiday.60 What s the best title of the pasage?A History of Saint PatrickBsDAany Official Holiday in

50、 USCThe Largest Parade in the World D Celebrations across the Country 61 What do you think is the official colorof St. Patricks Day?A Green.B Red.CBlack.DYellow.62 The last paragraph is mainly about _.Athe cruel slave trade.B Saint Patricks contribution.C activities during Saint Patricks DayDIreland

51、 s Patron Saint63 Which of the following is NOT TRUE according to the passage?A Parade is a most important event to observe Saint Patricks Day.B Saint Patricks Day is a religious holiday.C Saluting the former president has bee a main event on the occasion.DThe Saint Patricks Day paradheishtoarsy aof

52、 over two centuries.CHave you ever thought,“ I wish I could take a year off and just travel around the worldthree lucky American teenagers were able to do just that. The teens two males and one female-got an all-expenses paid,yearlong hike to five continents.This trip didn intclude any five -star ho

53、tels or shopping funs. Eighteen-year-old Jamie Fiel from Keller, Texas,17-year-old Arsen Ewing from Canyon, California, and 16-year-old Tyler Robinson from Lincoln, Massachusetts, didnetxpect fancy treatment. They signed up for the experience of a lifetime, which included hard work, often unfortable

54、acmodations, and encounters with some of nature s most dangerous animals and environments.Jamie, Arsen, and Tyler were among hundreds of high school kids nominated（ 推薦 ）by their science teachers to takethis trip. Earthwatch Institute sponsored （ 贊助 ） this adventure. Each year, Earthwatch employs tho

55、usands of volunteersworldwide to help with scientific research projects. The group went all around the world to get a close look at the mostpressing environmental issues of our time. Their assignments were as varied as their locations, and included measuring andattending pink flamingos in Kenya s Gr

56、eat Rift Valley, and tracking giant sea tursttlaes in CoRica.As they worked with the Earthwatch scientists, Jamie, Arsen, and Tyler began to understand that we are at a criticalmoment in the life of our planet. Time for change is running out. As the teens went from country to country and witnesseddi

57、fferent environmental dangers and challenges, they understood that solutions to important environmental issues start withthe power of one persons actions. They realized that each of them can make a difference. 64 These teenagers went on thejourney around the world _ .A to experience the most serious

58、 environmental problems on the earthB to bring the kindness of America to the other parts of the worldC to go on sightseeing around the worldD to call on more teenagers to join Earthwatch Institute65 WhatTsRUE about their journey?A They had to pay for their journey on their own expense.B They often

59、had to move from one hotel to another.C They had to take great pains to collect environmental information.D They received a warm wele every time they arrived at a new place.66 It can be inferred that Earthwatch Institute could be _.A an international university that takes in students from all over t

60、he worldB a TV station that makes programs on the beautiful scenery of the earthC a travel agency that organizes adventure trips specially for school childrenD an organization that brings science to life for people concerned about earth s environment 67 What did they theseteenagers learn from the jo