Unit 2【刷题型】语法填空精准练-2024-2025学年九年级英语上册单元模块必刷题（牛津译林版）

学年九年级英语上册单元模块满分必刷题牛津译林版2024-2025【刷题型】语法填空精准练Unit2Colours01Whafs yourfavorite colorIt was]of thefirst questionsyou askedas akid toa newfriend!There arethree primarycolors;red,yellow andblue.The threecolors canbe used2divide peopleinto differentgroups.The group of people3love red are very confident.Being cithersales menor athletesis suitablefor them.Themembers of this group are also energetic and4power.They alwaysbelieve thateverything willgo on as theyhaveplanned.They5no timeworrying aboutmistakes ordisasters thatmight happen.胆小的Yellow is6usual lovedby cowardly people.They getalong easilywith others7they are afraid ofarguments.So they hardly get angry with others or have a fight with someone.However,sometimes they are fullof wisdom,so theycan makewise8decide.Lovers of blue wouldrather believe9others than trust themselves.So this group of people preferto be followersinstead ofleaders.One who loves blueis quieteror shyer than others.He will10touch bysad moviesand memorieseasily.Different colorscan showdifferent personalitiesof people.Maybe youcan knowwhat someoneis likeaccording tothe color helikes.用括号中所给单词的正确形式填空，使短文内容完整、02正确There arethree primarycolours:red,yellow andblue.The threecolours canbe used11divide peopleinto differentgroups.The groupofpeoplewholove redare veryconfident.Being eithersales menor athletesis12suit forthem.Themembers ofthisgroupare alsoenergetic and13power.They alwaysbelieve thateverything willgo onas theyhaveplanned.They spendno time14worry aboutmistakes ordisasters thatmight happen.月旦小的Yellow is15usual lovedby covraM/ypeople.They getalong easilywith othersbecause they areafraid喈〃加争吵.of Sotheyhardlygetangrywithothersorhaveafightwithsomeone.However,sometimes they are fullof16wise,so theycan makewise decisions.力〃追Lovers ofblue wouldrather believe in othersthantrust17them.So thisgroupofpeople preferto beowers随者instead of18lead.One wholoves blueis morequiet orshyerthanothers.He19touch bysad moviesandmemories easily.

51.means

52.thinner

53.because

54.and

55.easily

56.the

57.bedrooms

58.worried

59.comfortable

60.happiness【导语】本文主要介绍了各种颜色在不同的文化中的各种含义句意这也意味着服从此处在句中作谓语，时态是一般现在时，主语是动词用三单故填

51.it,meanso句意它在时尚中很流行，因为它使人看起来更瘦分析

52.“It is popular in fashion because it makespeople look...”可知，此处暗含比较含义，用形容词比较级故填thinner句意白色在时尚界很受欢迎，因为它很轻盈，能和任何东西搭配是

53.it islight andgoes witheverything“White的原因，用引导原因状语从句故填ispopular infashion”because becauseo句意红色是一种热烈而强烈的颜色此处与并列，用连接，故填

54.:“hot”“strong”and and句意红色的东西很容易被注意到此处在句中修饰动词，用副词形式，故填

55.easily句意天空和海洋的颜色是蓝色，是最受欢迎的颜色之一此处是最高级+名词复数”结构，故

56.“oneof+the+填the句意它经常在卧室里使用此处表示复数含义，使用名词复数形式，故填

57.bedrooms句意但蓝色也会让人感到担忧此处在句中作表语，修饰人，故填

58.worried句意对我们的眼睛来说，这是一种舒适的颜色此处作定语修饰用形容词形式，故填

59.color,comfortableo句意一方面，它是幸福和喜悦的颜色此处与并列，用名词形式，故填

60.“joy”happiness

61.most popular

62.to make

63.because

64.was

65.easily

66.for

67.walls

68.first

69.His

70.an【导语】本文主要介绍了在中国各个朝代流行的不同颜色句意在春秋时期，紫色是最流行的颜色根据空前的定冠词并结合句意可知，此处应用形容词

61.:“the”“popular的最高级故填most popular”most popularo句意齐国国君总是穿紫色的衣服，所以他的子民也都穿紫色为了让他开心此处作目的状语，因此

62.用动词不定式故填“to make”to make句意紫色的衣服在那时很贵，因为人们需要捕猎一种特殊的动物来制成这种颜色分析前后句关系可知

63.此句是的原因，因此此处应用连词引导原因状语从句故填“Purple clotheswere expensiveat that time”“because”because句意在秦朝，人们最喜欢的颜色是黑色根据时间可知此句为一般过去时，且主语

64.“In theQin Dynasty”是第三人称单数，因此动词应用故填“peoples favoritecolor”be“was”was句意秦朝人喜欢黑色，因为黑色衣服容易清洗此处修饰动词，因此需用的副词形式

65.“wash”“easy”“easily”故填easilyo句意明朝因故宫而闻名“因……而闻名”用短语因此此处应用介词故填

66.“be famousfor”,“for”foro句意宫殿和城墙都是红色的是可数名词，根据前的并列名词可知此处也应用复数

67.wall”“and”“palaces”形式故填walls”walls句意有些人说，这是因为明朝的第一位皇帝，朱元璋根据空前的可知此处应用的序数词，

68.“the”“one”“first”表示第一位皇帝故填first句意他的姓是朱此空修饰后面的名词因此应用的形容词性物主代词位于句首首字

69.“lastname”,“he”“his”,母需大写故填His句意人们最喜欢的颜色经常变化，但是它们总在我们的生活中起着重要作用短语

70.“play animportant part”表示“起着重要作用”，因此此处应用不定冠词故填“an”an

71.have studied

72.are

73.can give

74.makes

75.are painted

76.to create

77.feel【导语】本文主要讲述了颜色和心情之间的关系句意长期以来，科学家们一直在研究颜色和情绪之间的关系根据可知，此处是“一直

72.“for along time”在研究颜色和情绪之间的关系“，用现在完成时，其结构是的形式，主语是是复数，助动“have done”scientists词用学习”，是动词，过去分词是故填have,study studied,have studied句意温暖明亮的颜色，如黄色和红色是积极乐观的颜色主语是是复数形式，一般现在时态，

73.bright colors动词用故填be are,are句意它们能给人一种愉快的感觉短语.“给某人某物”，此处是“这些颜色能给人们愉快的感

74.give sb.sth觉“，能，是情态动词，后加动词原形，故填can“can give句意橙色让人感到饥饿，所以很多餐馆都涂成这种颜色宾语+形容词作宾语补足语，表示“使……

75.make+处于…状态”，主语是是不可数名词，谓语动词变第三人称单数，使二是动词，故range make填makeso句意橙色让人感到饥饿，所以很多餐馆都涂成这种颜色主语是和谓语动词之间存在

76.a lot of restaurants被动关系，其结构是的形式，俨在上刷油漆”，是动词，过去分词是主语是复数，动“be done”pain painted,be词用故填are,are paintedo

78.:makesb.dosth.feel填feel

79.creating

79.their

80.Having

81.relaxing

82.considered

83.easily

84.think【分析】文章主要讲了颜色会影响人的心情，并详细介绍了蓝色，绿色以及红色对人们生活中的影响句意蓝色能创造一种平静的感觉，因为蓝色可以减缓脉搏，降低体温动词，表示“创造”，用

80.create结合空格前面的介词所以用的动名词形式故答案为create,of,create creating,creating句意很多人选择蓝色或者绿色作为他们最喜欢的颜色结合空缺处及其提供的单词，可知需要用一个形

81.容词性物主代词，表示“他们的，所以将改为产他们的，故答案为they theitheir句意养一些绿色植物在每个房子的每个房间是一个让气氛更加放松的好方式根据句子结构分析及其提

82.供的单词，可知本句主语为（）；谓语；表语have somegreen plantsin eachroom of a house^is a nice wayto make所以要用主语要用的动名词形式放句首首字母要大写，故答案为the atmosphere....,have having,Havingo句意养一些绿色植物在每个房子的每个房间是一个让气氛更加放松的好方式结合空缺处及其提供的单

83.词，可知此处用名词+形容词做补语，根据句意，此处表示“令人放松的、需要用形容词故答案make+relaxing,为relaxingo句意红色是一种吸引注意力的颜色，它被认为是最暖的颜色且经常产生激情和爱的感觉结合空缺处及

84.其提供的单词，主语是动词是根据句意，可知是“被认为“，所以需要用被动语态可知需it,consider,be+done,要用动词的过去分词故答案为considered,considered0句意但是，太多的红色很容易让人们生气结合空缺处及其提供的单词可知需要填入一个副词修饰

85.“使，让”，所以用形容词的副词修饰表示“容易地”，故答案为make easyeasily,easily句意如果你爱红色，考虑下红色的灯吧结合空缺处及其提供的单词，可知需要用固定搭配

86.think about,表示“考虑”，此处为祈使句，需要用动词原形故答案为think,thinkDifferent colourscan showdifferent20personality ofpeople.Maybe youcan knowwhat someoneis likeaccordingto thecolour helikes.03根据短文内容，用括号内所给词的正确时态或形式填空，使短文完整BThere aremany colorsin nature.But doyou knowif acolor has21weigh Ithink youllsay no”.But I am afraidyouare wrong.If youdont believe,you maydo asmall experiment.包裹First,put twoobjects withthe sameweight intotwo boxes.Then coverthe box.22three,wrap onebox withared pieceof paper,the otherwith awhite pieceof paper.OK.Now holdthe boxeswith yourhand oneby one.It is23certainly thatyou willthink thered oneis a little24heavy.Why doyou thinkso Ascientist foundthat differentcolors havedifferent weight in amans mind.So he did manytestsand atlast he25get theresult.That isto say,every colorhas26it ownweightin our mind.The scientisttold27we that colors alsohave smell.Can yousmell the color Ofcourse not.Then whydid the波长.scientists sayso Thatis becauseevery colorstands for a kind of lightwith acertain wavelengthIt28_reach our大脑感觉器官.brain throughsense organsAccordingto thisdiscovery,scientists saythat peopleaccept the colors theylike,and refuse the colorsthey hate.Soyour bodyand mindwill behealthy by29usethe colors youlike.Or you30be nervousor evenget ill.根据短文内容及所给提示，在文中的空白处填写一个正04确的单词Once upona time,the colorsof theworld startedto argue.Green said,“31clear Iam the mostimportant.I was32choose forgrass,trees andleaves.W33me,all animalswould die.Blue interrupted,It isthe water基石出that isthe basisof lifeand drawnup34the cloudsfrom thedeep sea.”Yellow smiled,The sunis yellow,themoon isyellow,and thestars areyellow.Every timeyou lookat sunflowers,35whole worldstarts tosmile.Purple,indigo靛蓝,red andorange coulds36it nolonger.They alsoshouted out:we arethe mostimportant.37Sudden rainstartedto pourdown.The colorswere38frighten andcame closeto oneanother forcomfort.The colorsunited andjoined hands.A rainbow39appear in the sky.The rainbowis as40ofhope fortomorrow andlets usremember toappreciate oneanother.05Every onehas his own wayof sayingthings andhisownspecial expressions.Many Americaneverydayexpressions arerelated tocolors.Red is a hotcolor.41America oftenuse itto expressheat.They maysay theyare red-hot aboutsomething unfair.When theyare red-hot theyare veryangry42something.Fast loudmusic ispopular withmany people.They maysay themusic is red-hot,43especial thekind calledDixieland jazz.Pink is a lighterkind of red.People sometimessay theyare in the pink44theyare in good health.The expressionwasfirst used in America at the beginning of the45twenty century.It probablycame fromthe factthat manybabies arebornwith anice pink skin that46show theyare in good health.Blue is a coolcolor.The47tradition bluesmusic inthe UnitedStates isthe oppositeof red-hot music.Blues isslow,sad andsoulful.Someone48is blueis verysad.The colorgreen isnatural fortrees andgrass.49it isan unnaturalcolor forhumans.A personwho hasa sickfeelingmay sayhe feelsalittlegreen.A passengeronaboat whois feelingvery sickfrom highwaves maylook verygreen.The colorblack50use oftenin expressions.People describea dayin whicheverything goeswrong asa blackday.灾难The dateofaserious tragedyis rememberedas ablackday.阅读下面短文，按照句子结构的语法性和上下文连贯的06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投降Black isthe color of power.It51mean submissiontoo.It ispopular infashion because it makespeople look52thin.纯吉.White isthe color of purity7White ispopularinfashion53it islight andgoes witheverything.Red isa hot54strong color.It isalso thecoloroflove.Red clothescan make people lookheavier.And redthings can注意到的.55easy getnoticedThe colorof thesky andthe ocean,blue,is one of56most popular colors.It isoften usedin57bedroom.But bluecanalso make people feel58worry.Green isthecolorof nature.It isa59comfort color for oureyes.Hospitals oftenuse greenbecauseitrelaxes patientsthere4Yellow isthecolorof sunshine.It isa warmcolor likered.On theone hand,it isthecolorof60happy andjoy.On害怕.the otherhand,it hasthe meaningof fear07Yellow andgray werethe colorsof theyear for

2021.People wouldlike tobuy clothes,bags andshoes inthesecolors.In China,there werepopular colorsduring differentdynasties.In theSpring andAutumn Dynasty,purple wasthe61popularcolor.The kingof Qialways dressedin purple,sohis peopleall worepurple clothes62make himhappy.Some of them evendidn9t likethecolor.Purple clotheswereexpensive at thattime63people neededto catcha specialkindofanimal tomake thecolor.In theQin Dynasty,peoples favoritecolor64be black.From therich tothe pooreveryone lovedblack.The Qinpeopleliked blackbecause theycould washblack clothes65easy.The MingDynasty wasfamous66the PalaceMuseum.The palacesand67wall wereall red.Red wasa popularcoloratthattime.Some peoplesaid itwas becauseofthe68one kingof Ming,Zhu Yuanzhang.69he lastname wasZhu.It meantred inChinese,so heliked thecolor red.Peoples favoritecolors oftenchange,but theywill alwaysplay70important partinourlife.08根据短文内容，用括号内所给动词的适当形式填空，必要时可加助动词或情态动词Do somecolors makeyou feelcalm whileothers giveyou energyScientists71study theconnection betweencolor心,情and moodfor along time.Many believethatcolorcan influenceour moods.Warm,bright colorssuch asyellow andred72be positivecolors.They73give peoplea pleasantfeeling.Coolcolors suchas blue,purple,and greenare relaxingcolors.They canhelp peopleexperience calm feelings.装饰Many publicplaces aredecorated withcertain colorsin orderto createcertain moods.Orange74make peoplefeel hungry,so alotofrestaurants75paint inthis color.People usecolor intheir homes76create moodsas well.Blue isa peacefulcolor.It helpsyou rest,so it isaverygood colorforabedroom.Colors cancreate badmoods,too.Some typesofbluemakepeoplefeel sad.Red canmakepeople77feel angry.What isyour moodright nowNow lookat thecolorofthe wallsaround you.Does itmatch yourmood09Colours canaffect moods.For example,blue hasa wayof78create apeaceful andcalmfeelingthats脉搏because bluecan slowthe pulseand lowerthe bodytemperature.A largenumber ofpeople chooseblue orgreen as79theyfavourite colour.Green,in manypeoplesminds,means nature,good luckor springtime.80have somegreen plantsin eachroom ofa houseisanice wayto maketheatmosphere alittle more81relax.Red isa colourthat drawsattention.Its82consider thewarmest colourand oftencreates feelingsof passionand love.But,too muchred can83easy makepeople angry.Dont usetoo muchred insideyour home,especially inthe livingroom.If youlovered,84think aboutsome redlamps.参考答案

1.one

2.to divide

3.who/that

4.powerful

5.spend

6.usually

7.because

8.decisions

9.in

10.be touched【导语】本文分别介绍了喜欢红色、黄色和蓝色的人的性格特点句意这是你小时候问新朋友的第一个问题！此处考查短语可数名词复数，表示“……之一符合句

1.oneof+意故填one

3.系代词或故填that whoowho/thato句意这个群体的成员也充满活力和力量根据”可知，

4.“The membersofthisgrouparealsoenergeticand…and前后一致，此处应填入的形容词形式作表语故填power powerful句意他们不会花时间去担心可能发生的错误或灾难此处考查短语“花费时间做某事”，

5.spend timedoing sth.根据前后文可知时态为一般现在时，主语为复数人称，谓语动词应用原形故填spend句意胆小的人通常喜欢黄色空格处应填入副词修饰动词频率副词意思是“通常”，符合句

6.loved,usually意故填usually句意他们很容易与人相处，因为他们害怕争吵根据汕

7.They getalong easilyw others…theyareafraid of可知，前为结果，后为原因，此句为原因状语从句故填arguments.”because because句意不过，有时他们也充满智慧，可以做出明智的决定空格处应填入的名词形式作动词

8.decide decision的宾语，且应用复数形式泛指一类事物故填make decisions句意喜欢蓝色的人宁可相信别人，也不相信自己短语意思是“相信某人，信任某人符合句

9.believeinsb.T意故填in句意他很容易被悲伤的电影和回忆所打动主语与动词为动宾关系，此处应用被动语态，根据

10.He touch前文的可知，此处为一般将来时的被动语态，结构为故填will will bedone betouched

11.to divide

12.suitable

13.powerful

14.worrying

15.usually

16.wisdom

17.themselves

18.leaders

19.is touched

20.personalities【导语】本文主要介绍了喜欢不同颜色的人的性格句意这三种颜色可以把人分成不同的群体“被用来做某事，固定短语，所以空处用动

11.be usedto dosth词不定式故填to divide句意当销售员或运动员对他们来说很合适后跟形容词作表语，对应的形容词是故

12.is suitsuitable,填suitableo句意这个团体的成员也充满活力和力量连接两个并列成分，由可知，空处应用的形

13.and energeticpower容词形式，故填powerfulo句意他们从不花时间担心可能发生的错误或灾难本句是“花费时间做某事”的结构，

14.:spend timedoing sth故填worrying句意黄色通常是胆小的人的最爱空处在句中作状语，所以应用的副词形式”通常、

15.usual usually故填usually句意然而，有时他们充满智慧，所以他们能做出明智的决定后跟名词作宾语，的名词形式

16.of wise是故填wisdomo wisdomo句意喜欢蓝色的人宁愿相信别人也不愿相信他们自己分析句子可知，句子的主语和宾语所指相

17.同，所以用的反身代词指“他们自己”故填them themselves,themselveso句意所以这群人更喜欢做追随者而不是领导者根据（追随者）;及所给词可知，

18.“befollowersinstead of此处指领导者，用对应的名词的复数形式故填lead leaderleaders,leaderso句意他很容易被悲伤的电影和回忆所触动主语和动词的之间是被动关系，时态是一般现在时，

19.he touch所以用一般现在时的被动语态，结构为主语是动词用的过去式是故填am/is/are donehe,be is,touch touchedisotouchedo句意不同的颜色可以表现不同的人的性格“性格”，可数名词，后跟名词复数形

20.personality different式，故填personalitieso

21.weight

22.Third

23.certain

24.heavier

25.got

26.its

27.us

28.reaches

29.using

30.will be【导语】本文主要通过实验说明了颜色在人们头脑中是有重量、有气味的，使用喜欢的颜色能让人保持健康句意但你知道颜色是否有重量吗？”称重、动词，空处缺宾语，用名词形式”重量工故填

21.weigh weightweighto句意第三步，用一张红色的纸包裹一个盒子，用一张白色的纸包裹另一个盒子根据

22.可知,空处表示第三步，用序数词首字母大写故填“First...Then…”third,Third句意你肯定会觉得红色的更重一点儿动词后接形容词作表语，的形容词是“确定的”

23.be certainlycertain故填certain句意你肯定会觉得红色的更重一点儿根据可知，红色盒子

24.you willthink thered oneisalittle…heavy.比白色盒子更重，用的比较级故填heavy heavierheaviero句意所以他做了很多测试，最后得到了这个结果根据可知，描述过去的事情，用一

25.hedidmany tests”般过去时，谓语动词用过去式故填get gotgot句意也就是说，每种颜色在我们心中都有自己的重量名词“某人自己的……”，空处用形容

26.ones own+词性物主代词故填its句意科学家告诉我们，颜色也有气味“我们”，主格，空处作的宾语，用宾格形式故填

27.we toldUSo句意它通过感觉器官到达我们的大脑句子描述客观事实，时态用一般现在时，主语是谓语动词用三

28.13单形式故填reaches句意所以你的身心会通过使用你喜欢的颜色而变得健康介词后接动名词作宾语故填

29.by using句意否则你会紧张，甚至生病表示将要发生的情况用一般将来时，结构是故填

30.will dowillbe

31.Clearly

32.chosen

33.Without

34.by

35.the

36.stand

37.Suddenly

38.frightened

39.appeared

40.symbol【分析】本文讲述了一个关于不同的颜色之间发生了争吵最后被一场雨变成了彩虹的童话故事句意显然我是最重要的清楚的，明显的，形容词根据可知该句的句子结

31.clear“Iamthe mostimportant”构完整，此处应该用副词修饰句子，是副词，显然地，明显地，因为位于句子句首，所以单词的首字母clearly要大写故填Clearly句意我被选为草、树和树叶动词，选择主语与动词之间是被动关系，用被动语态，

32.choose Ichoose后接过去分词故填was chosenchosen句意没有我的话，所有的动物都会死根据”可知是在没有绿色的情况下，结合首

33.all animalswould die字母可知要用介词句子开头首字母要大写故填w without,Without句意水是生命的基础，它是由来自深海的云朵形成的的意思是形成，这里的主语是水是

35.事物前时必须要用定冠词整个世界故填the,the wholeworld the句意紫色、靛蓝、红色和橘色再也受不了了根据可知这

36.“They alsoshouted out:we arethemostimportant.些颜色再也受不了了，结合首字母可推出用表示“忍受”，情态动词后接动词原形故填s standcould stando句意突然下起了倾盆大雨这里是副词放在句首来修饰整个句子的用法，的副词形式是

37.sudden suddenly,意为“突然故填Suddenly句意颜色们都被吓得紧紧地靠在一起来获得安慰观察句子可发现所需填的动词前面有动词，而且主

38.be语和谓语之间是被动的关系，用的过去分词故填frighten frightenedfrightened句意彩虹出现在了天空中文章以一般过去时叙事，设空处填的过去式表示“出现故

39.appear appeared填appeared句意彩虹是明天的希望的象征而且它让我们记住要感恩彼此根据产可知要填名词，结合题干中

41.Americans

42.about

43.especially

44.when

45.twentieth

46.shows

47.traditional

48.who/that

49.But

50.is used【分析】文章大意本文属于说明文的阅读范畴，主要介绍了美国习语中颜色的含义句意美国人经常用它来表示热烈

41.根据可知句意为美国人经常用它来表示热烈美国人，可数1America oftenuseitto expressheat.American名词，这里用其复数形式故答案为Americans,Americans句意当他们很气愤时，他们对于某件事是非常生气的

42.根据可知句意为:当他们很气愤时，他们对于某件事是非常When theyare red-hot theyareveryangry2something生气的这里表达的是“关于、对于用故答案为about,about句意他们可能会说这种音乐非常火爆，尤其是那种被称为迪克西兰爵士乐的音乐

43.根据可知句意为他们可能会说这种They maysay themusicisred-hot,3especial thekind calledDixieland jazz.音乐非常火爆，尤其是那种被称为迪克西兰爵士乐的音乐设空处修饰全句，所以用副词作状语，故especially答案为especially0句意当人们身体健康的时候，他们有时会说他们是

44.inthe pink根据.可知句意为当人们身体健康的时候，他People sometimessay theyare inthepink4theyareingoodhealth们有时会说他们是意为“当…的时候”，引导时间状语从句，故答案填inthepink whenwhen句意这个表达最早是在二十世纪初的美国使用的

45.根据知句意为这The expressionwas firstusedinAmericaat thebeginning ofthe5twenty century.nJ个表达最早是在二十世纪初的美国使用的世纪是第世纪，应用序数词，2020atthebeginningofthe twentieth在世纪初期，故答案为century20twentietho句意这可能是因为许多婴儿出生时就有漂亮的粉红色皮肤，这表明他们的健康状况良好

46.根据.It probablycame fromthe factthat manybabies areborn withanicepinkskinthat6show theyareingoodhealth可知句意为这可能是因为许多婴儿出生时就有漂亮的粉红色皮肤，这表明他们的健康状况良好句子时态为一般现在时，主语为第三人称单数，所以用三单，故答案为show shows句意美国传统的布鲁斯音乐与炽热的音乐正好相反

47.根据,可知设空处修饰后面的名词The7tradition bluesmusic inthe UnitedStates isthe oppositeofred-hot music所以用形容词意为“传统的，故答案为music,traditional,“traditional句意蓝色的人是非常悲伤的

48.根据.可知这里是一个定语从句，先行词指代人，且在从句中作主语，所Someone8is blueis verysad someone以用或引导，故答案为who thatwho/that句意绿色是树木和草的自然颜色但它对人类来说是一种不自然的颜色

49.根据以及.可知前后句之间是一种转The colorgreen isnatural fortrees andgrass.itisan unnaturalcolorforhumans折关系，所以用连接，故答案为but but句意黑色经常被用于表达

50.根据The colorblack10use ofteninexpressions.可知句意为黑色经常被用于表达be used被用做.・・・・・，句子陈述一般事实，时态用一般现在时，主语是单数，动词用故答案为be is,is used。