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专题03 单项选择专练-2022-2023学年九年级英语上学期期末考点大串讲(人教版)(解析版)
2022-12-02 | 阅:  转:  |  分享 
  
专题03 单项选择专练 2022—2023学年九年级英语上册期末考点大串讲 解析版1.The 31st Olympics _________
_ in Rio de Janeiro in 2016.(  )A.will holdB.is heldC.will be hel
dD.was held【分析】第三十一届奥运会2016年在里约热内卢举办.【解答】主语The 31st Olympics 是hol
d的承受者,结合in 2016用一般过去时的被动语态was/were+be+过去分词,故答案是D.故选:D。2.Was a car
invented________March 4,1876?(  )A.onB.inC.atD.of【分析】汽车是在1876年三月
四日发明的吗?【解答】答案:A.根据时间"March 4",可知这是具体到了3月4日这一天.in+年、月、季节等;at+时间点;o
n+具体到某一天.故选A.3.A year has four seasons and it ____________ twelve
different star signs.(  )A.divided intoB.is dividing intoC.divid
ing intoD.is divided into【分析】一年分为四季并被分为十二个不同的星座。【解答】it代指a year,判断
是被划分为十二个不同的星座,因此判断为被动语态,谓语动词为is done的形式。故选:D。4.This salad is made
_______ fruits and it _______.(  )A.of;smells wellB.from;is smel
led wellC.from;is smelled goodD.of;smells good【分析】这个沙拉是用水果做的,它闻起来
味道很好.【解答】考查常用介词的辨析.根据句意:这个沙拉是用水果做的,它闻起来味道很好.be made of 由……制成,能看出材
料;be made from由……制成,看不出材料;根据句意可知,沙拉是水果制成的,这是能看出来的,应用介词of,故排除B和C.s
mell闻起来,是一个系动词,后面跟形容词做表语,well是副词,应该用good.故选:D.5.﹣What do you thin
k of my shirt?It ________ cotton.﹣It looks nice on you.(  )A.is m
ade inB.is made forC.is made of【分析】﹣﹣你认为我的衬衫怎么样?它是纯棉做的.﹣﹣你穿着看起来很好
.【解答】be made in意思是"在…制造的"be made for意思是"为…生产;为…定制"be made of意思是"由
…制成的"可以看得出原材料.根据空格后面的词语是"cotton"棉花,因此可知这句话的意思是"你认为我的衬衫怎么样?它是纯棉做的.
"看得出衬衫的材质.故选:C.6.﹣It was amazing that Huoshenshan Hospital_______
____in such a short time at the beginning of 2020.﹣Yes. That''s Ch
ina Speed.(  )A.builtB.is builtC.was builtD.has built【分析】﹣令人惊讶的是,
霍神山医院竟然在2020年初这么短的时间内建成.﹣是的.这是中国速度.【解答】根据题干,可知主语是动作的承受者,用被动语态be+过
去分词.由at the beginning of 2020可知时态是一般过去时.主语Huoshenshan Hospital是单数
,用was.故选:C。7.﹣﹣Dear friends, do you still remember why you came h
ere three years ago?﹣﹣To __________ our dreams!(  )A.copyB.saveC.
imagineD.achieve【分析】﹣亲爱的朋友们,你们仍然记得三年前你们为什么来这里吗?﹣为了实现我们的梦想!【解答】A表示
复制、抄袭,B表示节约、救,C表示想象,D表示实现.根据题干可知三年前我们来这里是为了实现梦想,achieve符合题意.故选:D。
8.The kite in China more than 2,000 years ago.(  )A.inventsB.inv
entedC.is inventedD.was invented【分析】2000多年前中国就有风筝了.【解答】invents,in
vent的第三人称单数形式,意为"发明",用于一般现在时;invented,invent的过去式,意为"发明了",用于一般过去时;
is invented,意为"被发明",用于一般现在时的被动语态;was invented,意为"被发明",用于一般过去时的被动语
态.根据题干可知主语"The kite"是动作的承受者,因此谓语动词应用被动语态,排除A、B选项.由时间状语"more than
2,000 years ago"可知此处应用一般过去时的被动语态,排除C.故选:D。9.The number of the tea
chers in our school______60 and a number of them______male teache
rs.(  )A.is; areB.are; isC.am; areD.be; are【分析】我们学校有60名教师,其中有很多是男
教师.【解答】the number of…,……的数量,作主语时,动词用第三人称单数形式;a number of很多……作主语时
,动词用复数形式.故选:A.10.﹣Could you help me with my English after school?
﹣_____.(  )A.It''s a pleasureB.With pleasureC.You''re welcomeD.OK,I
could【分析】﹣放学后你能帮我学习英语吗? ﹣乐意效劳.【解答】根据 Could you help me with my E
nglish after school?可知表示请求许可,结合选项,A.这是我的荣幸 B.乐意效劳 C. 不客气 D.好的,我可以
,可知选项 B 符合题意.故选:B.11.The air pollution is very serious in our ci
ty. Something about it now.(  )A.can doB.must doC.was doneD.must
be done【分析】我们城市的空气污染很严重,现在必须采取措施.【解答】根据第一句可知:我们城市的空气污染很严重.由此可知第二
句应该是指"必须采取措施",要用情态动词must,句子中主语something是动作的承受者,要用被动语态,其被动语态为must
be done,故选:D。12.I hope all of you will come and actively___me in
the talent show.(  )A.changeB.supportC.liftD.hug【分析】我希望你们所有人都会来,并
在才艺表演中积极地支持我.【解答】A change 改变;B support 支持;C lift 举起;D hug 拥抱.根据句意
,空格处所在是表示"在才艺表演中",空格前又用了副词actively积极地,可推断出空格处用support符合语境.故选:B.13
.﹣Tom is always careless with his art work.Would you mind giving
him a hand?﹣Of course not! I think he_____to think twice before s
tarting.(  )A.should be toldB.can tellC.should tellD.can be telli
ng【分析】﹣﹣汤姆对他的艺术作品总是漫不经心,你介意帮他一下吗?﹣﹣当然不!我认为他应该在开始之前三思而后行.【解答】根据 I
think he_____to think twice before starting,可知前面应该是我认为他被告知在开始之前应该
三思.,这里用should,he是动作的承受者,句子使用被动语态,构成:should be+动词的过去分词.故选:A.14.﹣Ho
w I regret _____________ when my father told me not to play compu
ter games.﹣You''d better say sorry to him.(  )A.talked backB.talki
ng backC.to talk backD.to talking back【分析】﹣﹣当我爸爸告诉我不要玩电脑游戏的时候,我是多
么后悔和他顶嘴了啊!﹣﹣你最好和他道歉.【解答】答案:B.根据空格前面的词语是regret,regret经常用于"regret t
o do sth."意思是"后悔没做某事"还用于"regret doing sth."意思是"后悔做过某事"根据"You''d be
tter say sorry to him"你最好和他道歉.因此可知这句话的意思是"当我爸爸告诉我不要玩电脑游戏的时候,我是多么后
悔和他顶嘴了啊!"故选:B.15.There is something wrong with his TV.He wants to
get it _______ this afternoon.(  )A.repairingB.repairedC.to repa
irD.repair【分析】他的电视机出毛病了,他想今天下午把它修好.【解答】答案:B 分析句子,结合选项,推测意思是他的电视机出
毛病了,他想今天下午把它修好.这里考查短语get sth.done,表示一种被动关系,故选B被修理.16.I think ____
_ should not be allowed to drive.(  )A.sixteen years oldB.sixteen
﹣year﹣oldC.sixteen﹣year﹣oldsD.sixteen﹣years﹣old【分析】我认为十六岁的青少年不应该被
允许驾驶.【解答】答案:C.sixteen﹣year﹣old是由"数词+名词(单数)+形容词"构成的复合形容词,译为"十六岁的".
而这种复合形容词通常可以加s变为复数表示一类人或一类物,可独立作主语.故选C.17.﹣These plans are all ni
ce.I haven''t decided which one to choose.﹣It''s OK.You ______ plen
ty of time to decide.(  )A.gaveB.were givenC.will giveD.will be g
iven【分析】﹣﹣这些计划都很好,我还没有决定选择哪一个.﹣﹣没关系.给你充足的时间来决定.【解答】答案:D首先根据前面一句I
haven''t decided which one to choose"我还没有决定选择哪一个",可以推测下一句表达的"给你足够的
时间来决定"表述的是将要发生的事情,判断用一般将来时,主语you是动作give的承受者,所以用被动语态,一般将来时被动语态的构成是
:主语+will be+动词的过去分词,give的过去分词是given,故选D.18.I''m worried about the
___ of the product. I think it may be dangerous.(  )A.priceB.serv
iceC.licenseD.safety【分析】我担心这产品的安全性.我想它可能危险.【解答】price价格,service服务,
license许可证,执照,safety安全.根据 I think it may be dangerous,我想它可能危险.可以推
出safety符合题意.故选:D.19.To my surprise, Daniel''s parents allowed him
___________ Shanghai Disneyland with me.(  )A.to visitB.visitingC
.visitD.visits【分析】令我吃惊的是,丹尼尔的父母允许他和我一起参观上海迪斯尼乐园.【解答】visit"参观"是动词原
形,它的不定式是 to visit ,它的动名词或现在分词是visiting ,它的第三人称单数形式是visits.因allow
sb to do sth "允许某人做某事".由题干"令我吃惊的是,丹尼尔的父母允许他和我一起参观上海迪斯尼乐园."可知,空格是"
参观"用不定式,用to visit ,因此答案应是to visit.故选:A.20.﹣I don''t think students
should use mobile phones at school.﹣______.They really have a ba
d influence on our study.(  )A.I agree with youB.Not at allC.No p
roblemD.It''s my pleasure【分析】﹣﹣我认为学生在学校里不应该使用手机.﹣﹣我赞同你的看法.手机对我们的学习
真得有不好的影响.【解答】答案:A.首先明确各选项中句子的意思,A:我赞同你的看法.;B:不客气;C:没问题;D:乐意效劳;根据前
面一个人表达的意思是"我认为学生在学校里不应该使用手机."和答语中的"They really have a bad influen
ce on our study",确定设空处应该填"我赞同你的看法.".故选:A.21.This book______Lucy''s
.Look! Her name is on the book cover.(  )A.must beB.may beC.can''t
beD.mustn''t be【分析】这本书一定是露西的.看,她的名字在封面上.【解答】根据题干中Her name is on t
he book cover.可知露西的名字在书封面上,那么由此可推断这本书一定是露西的,表示对现在情况的肯定推测,则应用must+
动词原形.故选:A.22.You_______go and ask Meimei.She_______know the answe
r.(  )A.must;canB.must;mayC.need;canD.can;may【分析】你可以去问梅梅,她可能知道答案.
【解答】答案:D.考查情态动词.must必须.need需要.can可以.may可能.结合语境"你__去问梅梅,她__知道答案.".
可知,第一个空,用can可以.第二个空,表示推测用may可能.故选:D。23.﹣Whose textbook is it? Is
it Jenny''s?﹣No, it ________ be Jenny''s. Look, Helen''s name is on
the cover. I think it ________ be Helen''s.(  )A.can''t;mustB.mustn
''t;mustC.can''t;mayD.mustn''t;may【分析】﹣﹣它是谁教科书?是珍妮的么?﹣﹣不是,它不可能是珍妮的.看
,封面上是海伦的名字.我认为它一定是海伦的.【解答】第一个空,根据Helen''s name is on the cover"封面上
是海伦的名字"可知,"不可能"是珍妮的教科书.表示否定推测用can''t.第二个空,根据Helen''s name is on the
cover"封面上是海伦的名字"可知,"一定"是海伦的.用must.故选:A.24.Maria is always full o
f because she takes exercise every day.(  )A.energyB.talentC.hum
ourD.wealth【分析】玛丽亚总是精力充沛,因为她每天都在锻炼.【解答】energy精力,talent才能,humour幽默
,wealth财富;根据后句句意"因为她每天都在锻炼"和语法可知,前句句意为"玛丽亚总是精力充沛",要填"精力",其它选项语意不通
.故选:A。25.﹣﹣﹣ I take some photos in the hill?﹣﹣﹣No,you .(  )A.Ca
n,needn''tB.Must,mustn''tC.Could,won''tD.May,mustn''t【分析】﹣我可以在小山上拍一些照
片吗?﹣不,你不能.【解答】答案:D.may 可以,表示一种许可,May I/We+do sth?表示一种比较委婉的问句?否回答用
needn''t,needn''t不必,没有必要.mustn''t 不可以,不允许.由题干"﹣我可以在小山上拍一些照片吗?﹣不,你不能.
"可知,故选:D。26.﹣Who is the man over there?Is it Mr.Li?﹣No,it _______
be him.Mr.Li is much taller.(  )A.mustn''tB.may notC.can''tD.needn
''t【分析】﹣那边的男人是谁?是李先生吗?﹣不,不可能是他,他高的多..【解答】答案:C.may not不可以,can''t不可能,
needn''t 不用,不必,mustn''t千万不要.根据He''s much taller.他高的多,可知不可能是李先生,由题干"那
边的男人是谁?是李先生吗?不可能是他,他高的多."可知,故选:C。27.﹣﹣﹣Look! The woman at the sch
ool gate be our headmaster.﹣﹣﹣ No, it be her. She is holding a me
eting in the office now.(  )A.must; can''tB.must; mustn''tC.can; ne
edn''tD.may; mustn''t【分析】﹣﹣看!学校门口的那个妇女一定是我们的校长.﹣﹣不,不可能是她.她现在正在办公室开会
.【解答】考查情态动词.句意"﹣﹣看!学校门口的那个妇女一定是我们的校长.﹣﹣不,不可能是她.她现在正在办公室开会.".第一个空,
结合语境"学校门口的那个妇女__是我们的校长.".可知,应该是"一定"用must.第二个空,结合语境"不,___是她.她现在正在办
公室开会.".可知,表示否定推测,用can''t不可能.故选:A.28.﹣﹣﹣ Why not take _______umbrel
la with the sign "Made in China"? It is _____ useful umbrella?﹣﹣﹣
What _________ good advice it is!(  )A.an; an; aB.an; a; \C.a; a
n; aD.\; an; a【分析】﹣﹣为什么不带着"中国制造"的雨伞呢?它是一把有用的雨伞.﹣﹣这是多么好的建议啊!【解答】考查
冠词.句意:﹣﹣为什么不带着"中国制造"的雨伞呢?它是一把有用的雨伞.﹣﹣这是多么好的建议啊!第一个空,泛指一把雨伞,umbrel
la是以元音音素/?/开头,用an修饰.第二个空,泛指一把有用的雨伞,useful是以辅音音素/ju:/开头,用a修饰.第三个空,
advice不可数名词,不用a/an.故选:B。29.﹣﹣May I take the dog with me,sir?﹣﹣__.
Pets are not allowed to enter the hall.(  )A.Yes,you mayB.No,you
mustn''tC.Yes,you canD.No,you needn''t【分析】﹣﹣先生,我可以带狗去吗?不,你不可以.宠物不允许
进入大厅.【解答】答案:B.考查常用日常交际用语.句意:﹣﹣先生,我可以带狗去吗?不,你不可以.宠物不允许进入大厅.may引导的一
般疑问,肯定回答为Yes,you may/can.否定回答为No,you mustn''t.根据题干Pets are not al
lowed to enter the hall,宠物不允许进入大厅.可知应用否定回答,即不,你不可以.宠物不允许进入大厅.故选:B
.30.﹣﹣﹣Excuse me,may I come in?﹣﹣﹣Not yet.Please wait on your cha
ir _____ your name is called.(  )A.andB.untilC.afterD.since【分析】﹣打
扰了,我可以进来吗?﹣还不行.请在椅子上等,直到你的名字被叫到.【解答】and"和;然后";until"直到";after"在…之
后";since"自从".根据Not yet可知,句意为直到叫到名字才可以进来.故选:B。31.I prefer watching
TV to ________ music every day.(  )A.listen toB.listenC.listenin
gD.listening to【分析】与听音乐相比,我更喜欢看电视.【解答】根据I prefer watching TV to _
_______ music every day,可知考查prefer doing sth to doing sth,表示…和…相比
,更喜欢…固定用法.listen是不及物动词,后面接to.故选:D.32.﹣Do you like the weekly talk
show,The Reader,on CCTV?﹣Sure.It''s a great TV programmer________
__brings?the?habit?of?reading?to?the?public.(  )A.whoB.thatC.what
【分析】﹣﹣你喜欢每周的中央电视台的这个谈话节目朗读者吗?﹣﹣当然了,这是一个很棒的电视节目,它可以把阅读习惯带给公众。【解答】w
ho意为"谁",引导定语从句时,在从句中作主语;that意为"那个",引导定语从句时,在从句中作主语或宾语;what不能引导定语从
句。"a great TV programme一个很棒的电视节目"是一个表示物的先行词,用that来引导定语从句。故选:B。33.
Please remember to_________the electricity and water before you l
eave the laboratory.(  )A.take offB.shut offC.go offD.put off【分析】
在你离开实验室之前,记得关上电源.【解答】A. take off 起飞 B. shut off关闭 C. go off 离开 D.
put off 推迟.根据题干,可知是指你离开实验室之前,记得关上电源.故选:B.34.If you ___ practicin
g the piano every day,you could become quite a good pianist in th
e future.(  )A.care forB.think aboutC.stick toD.deal with【分析】如果你坚
持每天练习钢琴,将来你会成为一个很好的钢琴家.【解答】care for照顾.think about考虑.stick to坚持.de
al with处理.根据you could become quite a good pianist in the future"将
来你会成为一个很好的钢琴家"可知,应该是"坚持"练习钢琴.用stick to.故选:C.35.﹣What a heavy rain
!﹣So it is. I prefer ___________ rather than ____________ on such
a rainy day.(  )A.to go out, staying at homeB.staying at home, g
o outC.going out, stay at homeD.to stay at home, go out【分析】多么大的一场
雨啊!﹣﹣确实如此.在如此一个雨天,我宁愿呆在家,也不愿意出去.【解答】多么大的一场雨啊!﹣﹣确实如此.在如此一个雨天,我宁愿呆在
家,也不愿意出去.prefer to do sth. rather than do sth."宁愿做…而不做…".故选:D.36.
My mother has a poor _________of direction, so she is always afra
id to go out alone.(  )A.sceneB.silenceC.serviceD.sense【分析】我母亲的方向
感很差,所以她总是不敢一个人出去.【解答】scene场面,风景,silence沉默,service服务,sense感觉;结合句意"
我母亲的方向感很差,所以她总是不敢一个人出去"可知,要填"感觉",其它选项语意不通.故选:D.37.He has a friend
who_____ the piano very well.(  )A.playB.playingC.playsD.played【
分析】句意:他有一个钢琴弹得很好的朋友.【解答】答案:C 本题考查定语从句.a friend在主句中充当宾语,而在后面定语从句中充
当主语,who是关系词,修饰前面的先行词a friend,它是单数形式,时态为一般现在时,因此play要用三单形式plays.故选
C38.﹣I know Old Joe lives ______.﹣We are supposed to visit him fr
om time to time.Then he won''t feel _______.(  )A.alone,aloneB.lon
ely,lonelyC.lonely,aloneD.alone,lonely【分析】﹣﹣我知道老乔独自居住.﹣﹣我们应该时常去看望
他.那样他就不感到孤独.【解答】答案:D.alone强调独自一人,lonely指感情孤独.前个空指独自一人居住,所以用alone,
后一个指感情孤独,这里用lonely.故选D.39.I don''t like people ______ talk much bu
t do little.(  )A.whereB.thatC.whichD.whose【分析】我不喜欢说得多做得少的人.【解答】首
先根据语境推测句意是"我不喜欢说得多做得少的人.",分析句子结构,本句中的"______ talk much but do lit
tle"在复合句中作定语从句,由于先行词 people为下文定语从句的逻辑主语,且指人,所以引导定语从句的关系代词用that/wh
o.故选:B.40.﹣﹣What are you looking for?﹣﹣I''m looking for the pen __
_____ my father gave me last week.(  )A.whoB.whichC.whoseD.whom【分
析】﹣﹣你在找什么?﹣﹣我在找我爸上一周给我的那支钢笔.【解答】答案B.who意思是"谁"指人,在定语从句中作主语;which意思
是"哪一个"指物,在定语从句中作主语或宾语;whose意思是"谁的"指物或指人,在定语从句中作定语;whom意思是"谁"指人,在定
语从句中作宾语.根据"the pen"可知先行词是物,要用which或者whose来引导,另外根据"____ my father
gave me last week"可知空格处的引导词要在定语从句中作宾语,所以要用which来引导定语从句,故选B.41.﹣Co
uld you give me some _________ on how to keep healthy?﹣Yes.Eat le
ss junk food and do more sports.(  )A.mannersB.suggestionsC.intro
ductionsD.customs【分析】﹣﹣请给我一些如何保持健康的建议好吗?﹣﹣好的.少吃垃圾食品,多做运动.【解答】答案:B
考查名词词义辨析.句意:﹣﹣请给我一些如何保持健康的建议好吗?﹣﹣好的.少吃垃圾食品,多做运动.manners 礼貌. sugg
estions 建议. introductions 介绍. customs 风俗.根据回答少吃垃圾食品,多做运动.可知应该是问请
给我一些如何保持健康的建议好吗?故选:B。42.Everybody should make ________ effort to
reduce pollution and create a clean environment.(  )A.aB.anC.theD
.不填【分析】每个人都应该努力减少污染,创造一个干净的环境.【解答】答案:B.根据Everybody should make __
______ effort to reduce pollution and create a clean environment.
可知 每个人都应该努力减少污染,创造一个干净的环境.这里make an effort表示作出努力,固定说法.故选:B.43.Hon
g Kong Disneyland is well worth .(  )A.to visitB.visitedC.visitD.
visiting【分析】香港迪士尼乐园值得参观.【解答】根据句意:香港迪士尼乐园值得参观.考查句型be worth doing值得
做某事.故选:D.44.﹣To attend a concert, you are _______to shut off your
mobile phone.﹣ Thanks for telling me about it.(  )A.allowedB.exp
ectedC.acceptedD.invited【分析】要参加音乐会,你必须关掉手机.﹣谢谢你告诉我这件事.【解答】allow 允
许,expect期待,accept接受,invite邀请,此题根据语境:要参加音乐会,你必须关掉手机.﹣谢谢你告诉我这件事.be
expected to do 被期待做某事;故选:B.45.﹣﹣ I usually go swimming for exerci
se, but I want to try something new.﹣﹣ ________(  )A.So what?B.Ch
eer up.C.Like what?D.Take care.【分析】我通常去游泳锻炼,但我想尝试一些新的东西.比如说?【解答】考
查情境对话.A.So what?那又怎样?B.Cheer up.振奋起来;C.Like what?比如说?D.Take care.
当心.根据题干I usually go swimming for exercise, but I want to try some
thing new.可知应说比如说?故选:C.46.My teacher has given me useful suggesti
ons and I want to thank him from the _______ of my heart.(  )A.bo
ttomB.conditionC.wayD.surface【分析】我的老师给了我有用的建议,我想从内心深处感谢他.【解答】bott
om底部;condition条件;way方式;surface表面.根据"My teacher has given me usefu
l suggestions and I want to thank him from the _______ of my hear
t"因此可知这句话的意思是"我的老师给了我有用的建议,我想从内心深处感谢他."故选:A.47.We find_____imposs
ible for us______a foreign language well in a short time.(  )A.on
e;learnB.it;to learnC.that;to learnD.this;learning【分析】对我们来说我们发现在短时间内学好一门外语是不可能的.【解答】根据We find_____impossible for us______a foreign language well in a short time此题考查固定句型 发现干某事是怎么样的,find it+形容词 +to do.其中it是形式宾语,真正的宾语是后面的to do 不定式;故选:B.48.﹣What a good ________ you''ve given me!Thanks a lot.﹣My pleasure.( )A.informationB.newsC.suggestionD.advice【分析】﹣你给了我很好的建议 多谢.﹣别客气.【解答】该题考查名词的正确运用;A.information不可数名词,信息;B.news不可数名词,消息;C.suggestion可数名词,建议;D.advice不可数名词,建议;根据题中的good前有a,可知这里需要可数名词,所以选suggestion;故选C.49.When______ you supposed to______the meeting yesterday?(  )A.were;hadB.was;hadC.were;haveD.was; have【分析】你昨天应该什么时候开会的?【解答】从yesterday判断句子使用一般过去时,而be supposed to do sth表示应该做某事,主语是you,be动词用were,后面跟动词原形.故选:C.50.It''s rather cold here. You''d better ________ your coat.(  )A.put awayB.not put onC.not take offD.take off【分析】这里相当冷.你最好不要脱下外套.【解答】put away整理;not put on不要穿上;not take off不要脱下;take off脱下.分析句子可知,此处构成had better (not) do sth结构,根据It''s rather cold here"这里相当冷"可知,不要脱下外套.用not take off.故选:C。学科网(北京)股份有限公司 zxxk.com学科网(北京)股份有限公司
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