2017届高考英语二轮复习大题冲关秘籍完形填空之夹叙夹议文：创新押题（含解析）

　　Cloze1

　　话题 词数 难度 建议时间 得分

　　无论遇到什么样的困难，都要坚持下去

　　267 ★★★☆☆ 17分钟

　　If you ever feel as if you are being knocked about by life, think about the amazing bird called the Water Ouzel. I can’t imagine this waterbird knows what it is to have a 　1　 day. The little creature is often found living next to 　2　 waterfalls and rivers rushing fast. And however threatening the weather, however 　3　 the water, in snow and rain, the tough and cheerful Water Ouzel can be 　4　 chirping and singing. What’s more, while the 　5　 of most songbirds, however melodious in warm weather, fall 　6　 over long winter months, the hearty Water Ouzel 　7　 on through all seasons and every kind of 　8　. I have to wonder: does this little creature know anything I don’t?It’s as if the 　9　 knows that every violent storm will eventually 　10　 sunshine; every dark night will finally fade into 　11　. And isn’t it true? Even our bleakest and stormiest times do not 　12　 forever. Like the poor man 　13　 in the cement mixer, there is almost always an end to the 　14　.As the incredible humanitarian novelist Harriet Beecher Stowe said,＂ 　15　 you get into a tight place and everything 　16　 you till it seems as though you could not hold on a minute longer, never give up then, for that is just the place and time that the tide will 　17　.＂ I have had that 　18　 more times than I can remember.Maybe this is one of those days you feel as if you are 　19　 the cement mixer. If so, do you need to 　20　 a little longer?

　　1.A.dull

　　B.long

　　C.bad

　　D.wonderful

　　2.A.violent

　　B.distant

　　C.calm

　　D.slow

　　3.A.deep

　　B.cold

　　C.clear

　　D.dirty

　　4.A.recorded

　　B.kept

　　C.taught

　　D.heard

　　5.A.sizes

　　B.colors

　　C.voices

　　D.shapes

　　6.A.silent

　　B.sleepy

　　C.ill

　　D.deaf

　　7.A.lives

　　B.sings

　　C.survives

　　D.flies

　　8.A.time

　　B.river

　　C.music

　　D.storm

　　9.A.bird

　　B.novelist

　　C.man

　　D.farmer

　　10.A.take place of

　　B.get away from

　　C.give way to

　　D.catch up with

　　11.A.dawn

　　B.dusk

　　C.noon

　　D.night

　　12.A.come

　　B.last

　　C.stay

　　D.go

　　13.A.concerned

　　B.cared

　　C.complained

　　D.puzzled

　　14.A.party

　　B.story

　　C.trouble

　　D.day

　　15.A.when

　　B.because

　　C.although

　　D.whether

　　16.A.takes in

　　B.goes against

　　C.gets over

　　D.cuts off

　　17.A.end

　　B.go

　　C.rise

　　D.turn

　　18.A.experience

　　B.memory

　　C.idea

　　D.sight

　　19.A.beside

　　B.on

　　C.in

　　D.with

　　20.A.take up

　　B.hold on

　　C.put off

　　D.bring in

　　Cloze2

　　话题 词数 难度 建议时间 得分

　　爱生如子的老师会

　　277 ★★☆☆☆ 16分钟

　　My name is Sarah and I have just finished the fifth grade. My favorite teacher is Mrs. Wilson and she has truly 　1　 me. We have a wonderful 　2　. She is more than a teacher to me; she is a 　3　.I really know a lot about her because I really 　4　 her. She has done so much for me and I’ve done a lot for her too, especially 　5　. She has helped bring out the inner me. Mrs. Wilson knows just what to say to make you feel 　6　 about yourself. She has the smile that makes you 　7　.I want to be a teacher because of her. I know a lot about teaching 　8　 I often help classmates with corrections. I’m not going to 　9　. Teaching is really 　10　 work, but when you teach students something new and they 　11　 understand with a smile — it makes the frustrating day completely 　12　. Mrs. Wilson is devoted to her 　13　. To see her upset or 　14　 makes me feel the same way, so I do something to 　15　, like encouraging her with words or a smile to show I 　16　 and understand.I love reading and writing poetry about teachers and reading stories. That is what 　17　 my day. Mrs. Wilson is my role model. I want to be just like her when I 　18　. She has seen something in me that no other teacher has. She sees 　19　 deep inside me and says I brighten her day like a star, for she is the 　20　 of my universe — everything revolves around her!She is an A+ teacher.

　　1.A.invited

　　B.inspired

　　C.confused

　　D.annoyed

　　2.A.suggestion

　　B.dream

　　C.relationship

　　D.program

　　3.A.friend

　　B.parent

　　C.professor

　　D.director

　　4.A.forgive

　　B.comfort

　　C.miss

　　D.admire

　　5.A.manner

　　B.skill

　　C.encouragement

　　D.treatment

　　6.A.mad

　　B.curious

　　C.nervous

　　D.good

　　7.A.smile

　　B.give

　　C.rest

　　D.improve

　　8.A.unless

　　B.because

　　C.though

　　D.if

　　9.A.explain

　　B.lie

　　C.admit

　　D.check

　　10.A.hard

　　B.dirty

　　C.daily

　　D.useful

　　11.A.also

　　B.always

　　C.sincerely

　　D.finally

　　12.A.calm

　　B.familiar

　　C.worthwhile

　　D.busy

　　13.A.health

　　B.problem

　　C.job

　　D.family

　　14.A.shameful

　　B.poor

　　C.fearful

　　D.sad

　　15.A.warn

　　B.help

　　C.train

　　D.disturb

　　16.A.care

　　B.remember

　　C.succeed

　　D.respect

　　17.A.fixes

　　B.brightens

　　C.starts

　　D.spends

　　18.A.grow up

　　B.get off

　　C.move on

　　D.settle down

　　19.A.challenge

　　B.chance

　　C.faith

　　D.experience

　　20.A.top

　　B.back

　　C.side

　　D.center

　　 Cloze1

　　话题 词数 难度 建议时间 得分

　　母亲不给予女儿无私的爱的故事

　　282

　　17分钟

　　How important is it to offer our love, especially to those who are closest to us, with no strings attached? The 　1　 of the expression ＂no strings attached＂ may go back to ancient times when 　2　 were written on parchment(羊皮纸) that was rolled up and 　3　 with a string.

　　An unknown author beautifully 　4　 the no-strings-attached love in this heartfelt story titled The Rock. 

　　As she grew older her teenage daughter became increasingly 　5　. It was late one night when the police 　6　 her daughter for drunk driving. She had to go to the police station to 　7　 her daughter up.They didn’t 　8　 until the next afternoon. She broke the 　9　 by giving her daughter a small gift-wrapped box. Her daughter 　10　 opened it and found a little 　11　 inside.Her daughter rolled her eyes and said, ＂Cute, Mom, what’s this for?＂＂Read the card,＂ she instructed.Her daughter took the card out of the envelope in the box and 　12　 it. Tears started to trickle down her daughter’s cheeks. Her daughter got up and lovingly hugged her as the 　13　 fell to the floor.　14　 the card were these words: ＂This rock is more than 200 000 000 years 　15　. That is how long it will take before I 　16　 you.＂This mother is not saying, ＂I will love you 　17　 ...＂ Instead she says that she will love her daughter forever and nothing can change that. No 　18　 attached.When we learn to 　19　 like that, I think we’ll understand the words of Emmet Fox, who said, ＂If you could only love enough, you could be the most 　20　 person in the world.＂1.A.meaning

　　B.origin

　　C.influence

　　D.change

　　2.A.numbers

　　B.pictures

　　C.documents

　　D.diaries

　　3.A.secured

　　B.covered

　　C.commented

　　D.pasted

　　4.A.explains

　　B.proves

　　C.analyses

　　D.portrays

　　5.A.beautiful

　　B.rebellious

　　C.intelligent

　　D.lazy

　　6.A.blamed

　　B.rewarded

　　C.arrested

　　D.challenged

　　7.A.pick

　　B.bring

　　C.take

　　D.send

　　8.A.speak

　　B.arrive

　　C.work

　　D.rest

　　9.A.rule

　　B.law

　　C.heart

　　D.tension

　　10.A.eagerly

　　B.casually

　　C.immediately

　　D.secretly

　　11.A.rock

　　B.ring

　　C.fossil

　　D.dirt

　　12.A.wrote

　　B.opened

　　C.read

　　D.enjoyed

　　13.A.parchment

　　B.gift

　　C.string

　　D.card

　　14.A.On

　　B.With

　　C.For

　　D.At

　　15.A.heavy

　　B.old

　　C.long

　　D.new

　　16.A.look forward to

　　B.pay attention to

　　C.give up on

　　D.take care of

　　17.A.though

　　B.until

　　C.because

　　D.if

　　18.A.strings

　　B.words

　　C.warnings

　　D.threats

　　19.A.teach

　　B.love

　　C.think

　　D.support

　　20.A.poor

　　B.courageous

　　C.powerful

　　D.honest

　　Cloze2

　　话题 词数 难度 建议时间 得分

　　312 ★★★☆☆ 17分钟

　　Michael and Jenna were both sales associates for a siding company. They were 　1　at the same time, but Michael had a little more 　2　in writing proposals. Once Jenna learned this, she came to him with almost every single proposal she wrote, asking for his 　3　and input. Michael was 　4　to help at first, but Jenna eventually took up so much of his time that he had trouble keeping up with his own work. 　5　he tried to get her to learn from the advice he’d given in the past, Jenna always seemed to have a 　6　why she needed his help.While Michael was able to 　7　his deadlines and sell successfully, the drain Jenna created on Michael’s productivity prevented him from achieving the level of 　8　he was capable of — and that the company 　9　. Fortunately, their manager, Alice, was very 　10　her team and asked Jenna how often she went to Michael for help. Her answer wasn’t 　11　, so Alice talked to Michael and learned what had been 　12　. She told Michael that if Jenna needed help, he could send her to Alice’s office. At first Jenna was 　13　to ask Alice for help, but, under Alice’s guidance, she soon learned how to successfully 　14　her own proposal. Meanwhile, Michael was able to 　15　and increased his selling levels.One of the biggest responsibilities of being a 　16　is ensuring that all of your employees positively 　17　to the company. You should look not only at every employee’s personal productivity, but also at how his or her productivity influences the 　18　of the entire team. That an employee doesn’t do his or her job well is an obvious problem, but that one 　19　the work of others is just as 　20　— but harder to spot because the drain on the company may be quiet.1.A.rented

　　B.interviewed

　　C.employed

　　D.recorded

　　2.A.patience

　　B.time

　　C.difficulty

　　D.experience

　　3.A.help

　　B.comfort

　　C.mercy

　　D.money

　　4.A.hesitant

　　B.happy

　　C.confident

　　D.brave

　　5.A.If

　　B.Because

　　C.While

　　D.Whether

　　6.A.reason

　　B.chance

　　C.requirement

　　D.habit

　　7.A.accept

　　B.challenge

　　C.make

　　D.meet

　　8.A.success

　　B.wealth

　　C.fame

　　D.power

　　9.A.owned

　　B.needed

　　C.awarded

　　D.succeeded

　　10.A.in charge of

　　B.in need of

　　C.in tune with

　　D.in terms of

　　11.A.right

　　B.clear

　　C.dependable

　　D.serious

　　12.A.thinking of

　　B.giving away

　　C.working out

　　D.going on

　　13.A.afraid

　　B.reluctant

　　C.arrogant

　　D.active

　　14.A.analyze

　　B.explain

　　C.write

　　D.perform

　　15.A.focus

　　B.work

　　C.rest

　　D.plan

　　16.A.guide

　　B.teacher

　　C.doctor

　　D.manager

　　17.A.read

　　B.refer

　　C.contribute

　　D.turn

　　18.A.mood

　　B.productivity

　　C.goal

　　D.plan

　　19.A.relies on

　　B.takes over

　　C.takes up

　　D.holds back

　　20.A.difficult

　　B.important

　　C.dangerous

　　D.natural

　　Cloze1

　　【语篇解读】本文是一篇夹叙夹议文，主要介绍了一种鸟无论在什么季节和什么天气都会大声歌唱的情况。通过这个鸟，文章告诉我们，我们也应该像这个鸟一样，无论遇到什么样的困难，都要坚持下去。1.C 根据下文的threatening可知作者认为这种鸟根本就不知道恶劣天气是什么样子的。 2.A 由下文的＂rivers rushing fast＂可知，此处表示这种鸟住在飞流急湍的瀑布附近。violent＂猛烈的，强烈的＂符合语境。 3.B由下文中的＂in snow and rain＂可知，此处表示不管水有多么寒冷，故选B。 4.D考查上下文呼应。根据下文中的＂chirping and singing＂可知，此处表示听到这种鸟叫和唱歌的声音。 5.C结合后面的＂most songbirds， however melodious in warm weather＂可知，此处指这种鸟儿的歌唱声。voice＂嗓音，歌唱声＂符合题意。 6.A结合语境及生活常识可知，到了冬天，大部分鸣禽就不再唱歌了，变得沉默了。silent＂沉默的，安静的＂。 7.B与前面的＂most songbirds...fall silent＂形成对比，此处指这种鸟会继续唱下去，在所有的季节里歌唱。 8.D根据前面的＂all seasons＂可知，此处表示无论什么暴风骤雨，这种鸟都会歌唱。 9.A上文已经反复地提到了bird，故此处指的是前面提到的那种鸟。 10.C结合前面的＂every violent storm＂和后面的sunshine可知，这种鸟似乎知道暴风骤雨最终会让位于阳光。give way to sth.＂被代替＂，符合语境。 11.A与前面的＂dark night＂对比，此处表示黑夜终将消退于黎明。

　　 12.B 根据前面的＂bleakest and stormiest times＂和后面的forever可知，我们人生中的暴雨也不会永久地持续下去。last＂持续＂符合题意。

　　13.D结合语境并根据后面的＂in the cement mixer＂可知，此处表示那个可怜的人在混凝土搅拌机中抱怨。 14.C根据前面的＂bleakest and stormiest times do not last forever＂可知困境总会有结束的时候。 15.A根据语境可知，此处表示当你处于一种困境的时候，故用when引导时间状语从句。16.B考查固定搭配。根据＂till it seems as though you could not hold on a minute longer＂可知，这里指当一切事情好像都与你作对的时候。go against sb.＂反抗某人，与相背，对某人不利＂，符合语境。 17.D此处的tide意为＂潮流，趋势＂，此处表示形势会发生改变，故用turn。18.A根据后面的＂more times than I can remember＂可知作者已经有过很多类似的经历。19.C根据前面的＂the poor man complained in the cement mixer＂可知，此处应用介词in。 20.B根据语境可知，这里表示如果这样的话，你是否会再坚持一下呢?hold on＂(在困境或危险中)坚持住，挺住＂。e2

　　【语篇解读】一位爱生如子的老师会让学生铭记一生。

　　1.B 考查动词辨析。 由第四段中的＂role model＂可知，Mrs.Wilson的行为真的激励了作者，故选B。 A项意为＂邀请＂，C项意为＂使迷惑＂，D项意为＂使恼怒＂，均不符合题意。

　　 2.C 考查名词辨析。根据下一句可知，Mrs. Wilson与作者关系很好，故选C。 3.A考查名词辨析。由上一句可知，她们的关系非常好，由此可推知，她不仅仅是作者的老师，还是作者的朋友。故选A。parent＂父亲(或母亲)＂，professor＂教授＂，director＂导演＂。 4.D考查动词辨析。根据句意可知，此处表示作者非常了解她，因为作者非常崇拜她，故选D。 5.C考查名词辨析。她为作者付出了很多，作者也尽力去回报她，尤其是给她一些鼓励。故选C。第15空后的encouraging也给了提示。manner＂方式＂，skill＂技巧＂，treatment＂对待＂。 6.D考查形容词辨析。由前一句中的＂bring out the inner me＂可知，她把作者内心的动力激发出来了，她的话让学生自我感觉良好。故选D。 7.A考查动词辨析。她的微笑能感染你，让你也微笑，本空前的smile也给了提示。 8.B考查上下文的逻辑关系。空格前后两句话之间为因果关系，故选B。 9.B考查动词辨析。I’m not going to lie意为＂说实话＂，故选B。 10.A考查形容词辨析。本空与上一空紧密相连，作者认为教学真是一项艰难的工作。故选A。11.D考查副词辨析。由本空前的＂something new＂可知，在老师的指导下，学生最终理解了新知识。故选D。 12.C考查形容词辨析。当学生理解后露出笑容时，哪怕你再不开心也会感到欣慰，因为你自己的付出是值得的。此处与本空前的frustrating构成对比。calm＂镇静的＂，familiar＂熟悉的＂，busy＂忙碌的＂。13.C考查名词辨析。作为一名女教师，Mrs. Wilson全身心地投入到教学工作中，故选C。14.D考查形容词辨析。根据本句中的upset和or可知，此空应填一个与upset属于同一范畴的词，比较选项可知，只有D项符合题意。 15.B考查动词辨析。看到她沮丧或悲伤时，作者就会帮助她。 16.A考查动词辨析。作者用语言或微笑鼓励她，以示作者关心她，理解她。此处用care与本空后的understand构成并列，故选A。 17.B考查常识。由前一句可知，这些关于老师的诗和故事让作者心情愉快。第19空后的＂I brighten her day＂也给了提示。故选B。 18.A考查动词短语辨析。 grow up＂长大＂，get off＂下班＂，move on＂前进＂，settle down＂安静下来＂。由本空前的＂like her＂可知，此处表示长大以后，作者也想当一名像她那样的老师。19.C考查名词辨析。Mrs.Wilson发现了作者内心深处的信念，那像一颗星星照亮了她的内心，故选C。

　　 20.D 考查名词辨析。由本空后的＂everything revolves around her＂可知，作者就像一颗星星照亮了她的内心，而她也是作者宇宙的中心，作者所有的活动都是围绕着她的。故选D。

　　Cloze1

　　【语篇解读】这是一篇夹叙夹议文，主要讲述了一位母亲不附加任何条件，给予惹是生非的女儿无私的爱的故事。

　　1.B考查名词辨析。结合后面的＂go back to ancient times＂可知，这里指这个短语的起源。origin＂起源，源头＂。 2.C考查名词辨析。根据后面的＂were written on parchment(羊皮纸)＂并结合常识可知，写在羊皮纸上的应该是一些文献。故选C。 3.A考查语境选词。根据语境可知，此处指把羊皮纸卷起来并用一根绳子捆起来，以确保文献的安全。secure＂使安全＂。 4.D 考查语境选词。从后面的＂in this heartfelt story＂可知，这位作家在这个真诚的故事中很好地描绘了这种不加任何条件的爱。portray＂描绘＂。

　　 5.B考查语境选词。根据后面的＂her daughter for drunk driving＂可知，她女儿变得越来越桀骜不驯。rebellious＂叛逆的，桀骜不驯的＂。

　　 6.C考查语境选词。从后面的＂drunk driving＂可知，她女儿酒后开车，被警察拘留了。arrest＂逮捕，拘留＂。 7.A考查语境选词。根据前面的＂She had to go to the police station＂可知，女儿被警察拘留了，因此母亲需要到警局去把女儿接回来。 8.A考查逻辑推理。根据后面的＂until the next afternoon＂可推知，因为母亲对女儿的行为不满，她们直到第二天下午才说话。 9.D考查名词辨析。结合前面的 ＂didn’t speak＂和后面的＂by giving her daughter a small gift-wrapped box＂可知，母亲给了女儿一个礼品盒来打破她们之间的僵局。tension＂矛盾，紧张局势＂。 10.B考查语境选词。由于女儿有点桀骜不驯，因此她应该是漫不经心地打开盒子。casually＂漫不经心地＂。 11.A考查上下文呼应。根据下文的＂This rock is more than 200 000 000 years＂可知，盒子里装的是一块石头。故选A。 12.C考查上下文呼应。从上文的＂‘Read the card，’ she instructed.＂可知，女儿对盒子里的石头感到不解，于是母亲让她读信封里面的卡片。 

　　13.D考查上下文呼应。由上文中的＂Her daughter took the card out of the envelope＂可知，女儿手中拿着的卡片在她起身拥抱母亲时落到了地上，故选D。

　　 14.A考查上下文暗示。根据后面的内容可知，卡片上写的是母亲想说给女儿的话。 15.B考查形容词辨析。结合语境可知，此处表示这块石头已经有两亿年的历史了，故应用old。 16.C考查语境逻辑。从上文的＂That is how long it will take before＂可知，这里指母亲永远不会放弃她，不会对她失去希望。give up on＂对不抱希望＂。 17.D考查语境逻辑。根据上文中的＂not saying＂以及下文的＂Instead she says that she will love her daughter forever and nothing can change that.＂可知，这位母亲对女儿的爱是没有条件的，故此处应用if。18.A考查上下文呼应。由文中反复出现的＂no strings attached＂可知答案。19.B考查上下文呼应。由上文的＂she will love her daughter forever＂和第一段中提到的love可知，这里选B。 20.C考查语境逻辑。结合前面的＂If you could only love enough＂ 可知，Emmet Fox认为爱可以使人拥有强大的力量。故选C。1.C考查语境逻辑。根据前面的＂Michael and Jenna were both sales associates for a siding company.＂可知，此处表示他们同时被雇用。故选C。rent＂租用，出租＂；interview＂面谈，访问＂；record＂记录，录制＂。 2.D考查语境逻辑。结合后面的＂she came to him with almost every single proposal she wrote＂可知Jenna向Michael求教，这表明Michael比Jenna有经验。故选D。patience＂耐心，忍耐力＂；time＂时间，时候＂；difficulty ＂困难，难事＂。 3.A考查上下文呼应。根据下文中的＂to help at first＂可知，此处表示Jenna向Michael寻求帮助。comfort＂舒适，安慰＂；mercy ＂仁慈，宽恕＂；money＂钱，收入＂。 4.B考查语境逻辑。根据后面的＂to help at first， but Jenna eventually took up so much of his time＂可知Michael起初还是非常愿意帮忙的，但是后来Jenna占用了他大量的时间。故选B。hesitant＂犹豫的，踌躇的＂；confident＂有自信心的，有把握的＂；brave＂勇敢的，无畏的＂。 5.C考查语境逻辑。根据后面的＂he tried to get her to learn from the advice he’d given in the past， Jenna always seemed...＂可知，此处存在让步关系，故选C。

　　 6.A考查语境逻辑。根据空格后面的＂why she needed his help＂可知，Jenna总能找到理由让Michael给予帮助。

　　 7.D考查固定搭配。从后面的＂his deadlines and sell successfully＂可知Michael能够如期完成任务，meet the deadline是固定结构，意为＂如期完成＂。 8.A考查语境逻辑。根据前面的＂the drain Jenna created on Michael’s productivity prevented him from achieving the level＂可知，因为Jenna，Michael无法达到自己成功的水平。 9.B考查上下文呼应。根据前面的＂the level of success＂可知，此处指公司需要的。10.C考查语境逻辑。结合语境和后面的＂asked Jenna how often she went to Michael for help＂可知，这个经理和员工们关系很融洽。in tune with＂与协调，融洽＂，故选C。in charge of＂负责＂；in need of＂需要＂；in terms of＂就而言，在方面＂。 11.B考查语境逻辑。结合后面的＂so Alice talked to Michael and learned＂可知，Jenna的回答很模糊，因此这个经理和Michael交谈了解了情况。right＂正确的，恰当的＂；dependable＂可信赖的，可靠的＂；serious＂严肃的，认真的＂。 12.D考查上下文暗示。根据前面的＂so Alice talked to Michael＂可知，经理和Michael交谈，了解了到底发生了什么事情。故选D。think of＂想象到，想出，想起＂；give away＂分发，捐赠＂；work out＂计算，算出，解决＂。

　　 13.B考查上下文暗示。根据后面的＂to ask Alice for help， but， under Alice’s guidance＂可知，起初Jenna不愿意向经理寻求帮助。reluctant＂不情愿的，勉强的＂，故选B。afraid＂害怕，担心＂，arrogant＂傲慢的，自大的＂；active＂忙碌的，积极的＂。

　　 14.C考查上下文呼应。根据第一段中的＂writing proposals＂可知，这里应填write。analyze＂分析＂，explain＂解释＂，perform＂表演＂。 15.A考查语境逻辑。因为没有了Jenna的打扰，Michael可以集中注意力做自己的事情了，并提高了自己的销售水平。 16.D考查上下文暗示。上文已经提到了＂Fortunately， their manager， Alice＂，由此可知此处表示一个经理的最大的责任之一就是确保每一个员工都积极地为公司做贡献。 17.C考查语境逻辑。根据前面的＂ensuring that all of your employees positively＂可知此处表示确保每一员工都积极地为公司做贡献。 18.B考查上下文呼应。根据第二段中的＂the drain Jenna created on Michael’s productivity prevented him from achieving＂可知此处应填productivity。

　　 19.D考查语境逻辑。与前面的＂That an employee doesn’t do his or her job well is an obvious problem＂呼应，此处指一个雇员不能干好工作和一个雇员妨碍其他人的工作是同样危险的。hold back＂妨碍进展＂，故选D。rely on＂依赖，依靠＂；take over＂接手，接管＂；take up＂开始从事，占用＂。

　　 20.C考查上下文暗示。与前面的＂an obvious problem＂相呼应，此处应选C。