北京大学15春《大学英语3》在线作业四答案.docx

北京大学15春《大学英语3》在线作业四答案.docx

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北京大学15春《大学英语3》在线作业四答案

北大15春《大学英语3》在线作业四答案

作业ID：

29347

1.

鼓励自主完成，严惩抄袭。

Mr.Obamawillgiveaspeechonthecurrentsituationatthemeeting____D_____nextweekinBeijing.

A.A.tohold

B.B.held

C.C.holding

D.D.tobeheld

2.

Itwasinasmallvillageinthesouth___A______hespenthischildhoodandmethislife-longfriend–thelocalschoolmaster.

A.A.where

B.B.when

C.C.which

D.D.that

3.

Ithinkfishingisanicehobbybutneedsagooddealof____D__.

A.A.relation

B.B.limitation

C.C.strength

D.D.patience

4.

Finallywemadea____B__thatIshouldcookdinnerandshewouldwashupafter.

A.A.trip

B.B.bargain

C.C.face

D.D.fool

5.

Firstofall,ateachershouldshowloveforhisstudentsontopofhisacademicknowledge._______C_____,heisnotqualifiedforhisposition.

A.A.Therefore

B.B.Otherwise

C.C.However

D.D.Because

6.

FormanyoverseasChinese,Chinaistheirreal_____D__,becausetheywerebornandgrewupthere.

A.A.home

B.B.family

C.C.house

D.D.household

7.

Doyouknowthe____B________ofthesayingIjustquoted?

A.A.resource

B.B.source

C.C.course

D.D.cause

8.

TheInternethasbrought________A____bigchangesinthewaywework.

A.A.about

B.B.out

C.C.up

D.D.back

9.

IfonlyI_____D_hardinthepastfewmonths!

ButIdidn’tworkhardenoughandfailedthemathexamination.

A.A.work

B.B.worked

C.C.haveworked

D.D.hadworked

10.

Noneofusknewhowthechangehadcome_B_____.

A.A.across

B.B.about

C.C.over

D.D.down

11.

Thenumberofmembersintheclub___C_totwohundred.

A.A.werelimited

B.B.limits

C.C.waslimited

D.D.limited

12.

Therearemanyfashionshopsandexpensiverestaurantson__C__sidesofthestreet.

A.A.all

B.B.each

C.C.both

D.D.every

13.

Iwentto____Londonyesterdayandsaw__A__strangeoldmanandalittlegirl,beggingbytheroadside.

A.A./;a

B.B.a;/

C.C./;the

D.D.the;/

14.

Speakloudersothatyoucanmakeyourself___A____.

A.A.heard

B.B.tohear

C.C.hearing

D.D.havebeenheard

15.

Nowitwon’tbelongbeforewemeetagain,__D______?

A.A.willit

B.B.dowe

C.C.won'twe

D.D.doesit

16.

请在以下句子划线部分中，挑出错误的选项。

Theharderhetried,themostfailureshesufferedinhisearlydaysasawriter.

B

A.A.Theharder

B.B.themostfailures

C.C.suffered

D.D.asawriter

17.Onlyunderspecialcircumstancesfreshmenarepermittedtotakemake-uptests.

C

A.A.under

B.B.circumstances

C.C.freshmenare

D.D.totake

18.Itwasuntilafterhisdeaththathewasrecognizedasagreatcomposer.

A

A.A.Itwasuntil

B.B.that

C.C.wasrecognized

D.D.agreatcomposer

19.YoucanarriveinBeijingearlierforthemeetingthoughyoudon’tmindtakingthenighttrain.

C

A.A.can

B.B.earlier

C.C.though

D.D.taking

20.Whynotstayathomesincethattheroadissoslipperyaftertheheavysnow?

B

A.A.Whynot

B.B.sincethat

C.C.is

D.D.heavysnow

21.

请阅读以下文章，回答文章后的五个小题。

每个小题只有一个最佳选项。

Astheschoolyearkicksoff,parentsareonceagainstragglingtocajole（哄骗）and,ifneedbe,dragtheirexhaustedteensoutofbed.Thatimagemaymakeyoulaugh,butlackofsleepisnojoke.Teenagerswhodon’tgetenoughresthavemorelearning,health,behaviorandmoodproblemsthanstudentswhogetatleastninehoursanight.Long-termlackofsleepistiedtoheartdisease,overweight,depressionandashortenedlifespaninadults,indicatingtheimportanceofestablishinggoodsleephabitsearlyinlife.Lackofsleepcanbeespeciallydeadlyforteens;caraccidentsaretheleadingcauseofdeathamongteenagers,andsafetyexpertsbelievesleepydrivingisamajorfactor.

Unfortunately,fewteenagersgetthesleeptheyneed.Inasurveyofmiddle-andhigh-schoolstudents,UniversityofColoradoresearchersfoundthat82percentsaidtheywokeuptiredandunrefreshed,andmorethanhalfhadtroubleconcentratingduringthedayatleastonceaweek.

Blamemultitaskingforsomeofthis.Manystudentsarejugglingafter-schoolactivities,homeworkandpart-timejobs.Evenwhentheymanagetofulfilltheseobligationsbyareasonablehour,television,theInternet,videogames,phonecallsandtextmessagestofriendsoftenkeepthemawakedeepintothenight.Takingsodaandenergydrinkslateinthedayandgoingtolate-nightpartiesonweekendsaddtosleepdebt.Biologyalsoworksagainstteenagers’sleep,Thebody’sinternalclock,whichcontrolswhenapersonstartstofeeltired,shiftsafterpuberty（青春期）,makingithardformostteenstofallasleepbefore11pm.Classusuallybeginsbefore8:

15am,withmanyhighschoolsstartingasearlyas7:

15am.Togettoschoolontime,mostteenshavetogetupby6:

30am,guaranteeingthey’llbesleep-deprivedduringtheweek.Teensoftensleepmuchlateronweekendstocatchup,