練習(xí)一
　　present;since;doct
　　present;since;doctor;pollution;open;D;A;B;A;C;B;B;AD;B;wastaught;married;swim;came;havebeen;havelived;was.
　　練習(xí)二
　　changes;seen;infact;marry;southern;hadfun;won'tuntil;havebeenmarried;haskept;differentfrom
　　AADBDABB
　　練習(xí)三
　　possible;service;althgough;attraction;present;have;since;Howmany;Whenbuy;Havecarried;been;hasn't;sad;去掉but;
　　yet;nextto;hasbeenopened;anylonger;howtoget;It'storead;Itiscame;butcame;haveknown;arefondof
　　練習(xí)四
　　CBACCB;notarrived;yet;Howlong;heard;Haseverbeen;Haschanged;yet;
　　IhavelivedheresinceIwasborn.
　　It'spleasanttoplayChinesechesswithmyclassmates.
　　AlthoughTomwasill,hewenttoschool.
　　WhereisMarry?Shehasgonetothecinema;
　　HaveyoubeentoBeijing?YesIhave.
　　Iusedtoplaycomputergames,nowIdon'tdoit.
　　練習(xí)五
　　athemepark;fastfood;wavetous;getmarried;duringthesummerholiday;moveathighspeed;feelexcited;thewholeday;gosight-seeing;waitforanhour;stoptakingphotos;havegonetoShanghai;havebeentoShanghai;onthesecondday;
　　careful;carefully;helpful;helpfully;hopeful;hopefully;wonderful;wonderfully;noisy;noisily;healthy;healthily;lucky;luckily;shiny;shinily;impolite;impossible;unkind;unpleasant;cheerless;harmful;different;present;cross;lovely;present;pleasant;ofcourse;goback;performance;sailing;development;closing;education;feeling;discussing;meaning
　　練習(xí)六
　　haveseen;saw;weredoing;washelping;do;waswatching;knocking;wereknocking;were***;didn'tstop;toread;weredancing;nottotake;wereclapping;wasmarching;
　　ThesouvenirsaresoexpensivethatIcan'tbuyit.
　　Heisrichenoughtotravelaroundtheworld
　　Whatwereyoudoingwhenhearrived?
　　Danielwasswimminginthelakeatnoonyesterday;
　　useless;delightful;as;frightened;Italy;happily;meaning;exciting;screamed
　　練習(xí)七
　　outside;morning;called;office;suprised;tickets;because;cinema;themselves;taken;CBCADBACBD
　　練習(xí)八
　　hasbeenawayfromShanghaifortwodays.
　　can'tstoptakingphotoswiththembecausetheylookverycute.
　　havebeeninHongKongforaweek
　　havegonetoHongkongtwice
　　hasgonetoHongkong
　　beenawayfortwodays
　　isquitedifferentfromthatinBeijing
　　neverforgetthemeaningfulexperience
　　didyoucomebackfromHongKong
　　arrivedherethedaybeforeyesterday,Ihavebeenbackfortwodays.
　　練習(xí)九
　　information;change;enjoy;screen;soon;short;repair;isdesignedby;e-dogfor;wasn'tevening;hasbeenfor;important;used;togo;sold;more;libraries;made;willreplace;pleasure;tobuy
　　練習(xí)十
　　ABBBDCDA
　　funny;printer;designed;looking;written;correctly;educational;knowledge;passed;
　　atthesametime;comeout;sende-mails;getapoint;orderasetontheInternet;couldswithdifferentcolours;playarole;haveadream;manyplacesofinterest;besoldout;searchforinformation;aremotecontrol;word-processing;aten-year-oldboy;playaroleof;fallasleep;beusedwidely;double-clickontheicon;
　　Whatdoyouusuallyusethecomputerdo
　　Thecomputerisdesignedforstudents
　　CanIhelpyou?I'dliketobuyapersonalcomputer
　　Shewillhelpyouwhennecessary
　　練習(xí)十一
　　wasleft;isdouble-clicked;isproduced;isput;tokeep;BBBCA
　　練習(xí)十二
　　levels;character;uses;village;jump;goal;ask;knowledge;needs;designed;written;starting;hasworked;iscaught;aremarked;typing;wasbroken;waslost;ismade;isused;beclicked
　　下題略
　　練習(xí)十三
　　searchedfor;wasn'tfound;sothatcan'ttake;wasmadetomove;hastaughtfor;somephotoswasfor;
　　Thewordshesaidsoundedexciting;
　　Thiskindofnews***comesoutonceaday.
　　IplayedaroleofaEnglishteacherinmydream.
　　TheneweducationalCD-ROMsaresoldout.
　　TheCD-ROMcanbeusedtotestyourEnglishvocabulary.
　　reading;who;richest;about;how;have;on;take;interested;lesson;treasure;covered;set;vocabularies;producer.
　　練習(xí)十四
　　mostexciting;months;donating;organization;duties;introducing;decision;washeld;toorganize;tocome;called;
　　Whydon'tyoujoin;chosehetobethehostofthecharityshow;toworkfortheProjectHope;Thereisnotimetowait;attherighttime;mustpractisemore;seemedtohappensoquickly;advertiseontheInternet;makelotsofnoise;SpringBudproject
　　練習(xí)十五
　　becauseoftheheavyrain;didn'tstartworking;Whatwas;HowdidRickyfeelinthecharityshow;Itisfunto
　　注A:becauseBbecauseof
　　ABABABAB
　　BFAGD
　　練習(xí)十六
　　B去掉a;Cto;Csuccess;Cbecauseof;Ahopeto
　　BBCBACAABC
　　練習(xí)十七
　　voluntary;international;rest;advertisement;education;kindness;operations;people;donations;collection
　　entrance;audience;seats;curtain;light;stage;microphone;performer;clapped;exit
　　casesofblindness;trainthelocaldoctorsandnurses;aflyingeyehospital;keeponworking;begratefultosb;performoperations;affectsixtypercentofstudents;havesomepocketmoneyleft;beproudtodosth.;tratandcureeyeproblems;beabletobuythemedicine;geteducation;raisemoneyforcharities;donatemoneyto
　　練習(xí)十八
　　internationalcharities;helppoorpeople;takeactiontodosth.;mindothers;beinhosipital;voluntarydoctors;pocketmoney;organizeeventstoraisemoney;setupUNICEF;spendmoneyon
　　advertisement;operation;development;education;kindness;sickness;flying;teaching;organization;tratment;
　　BBADCCCBCCBCBADA
　　練習(xí)十九
　　BCADE;
　　charity;eye;cured;prevented;operated;operations;see;local;skills;knowledge;support
　　Itwasstartedon11September,1961
　　Itworkstosavetheearthanditsenvironment
　　Volunteersanddonations.
　　Tostopairpollution,protecttheearthforestsandsaveallplantsandanimals.
　　InChina,itworkstosavethepandafromdyingout.InSouthAmerica,itworkstosavetheAmazonRainforest
　　ABCCA
　　練習(xí)二十
　　連線不太好發(fā)，省去吧
　　performinganoperation;pocketmoney;operatedon;medicaltratment;usedto;weregratefulto;Isusedto;aflyingeyehospital;hadabiglunch;casesofblindness;
　　tooweakto;usedtoget;isn'tusedto;Didusetowatch;usedtobe;isused;isn'tcheapenough
　　BCDACBCABACCBCA
　　練習(xí)二十一
　　agreement;gladness;collection;illness;prevention;advertisement;development;decision;kindness;gentleness;sadness;sickness;education;organizagtion;improvement;usefulness;movement;happiness;
　　hascuredillness;poorareasformedicaltratment;isperformingoperationon;proudhavehelped;youkeepdoing;gratefultobecauseofdonations;usedtodrink;Usedto;havelivedamusedto;usedtolive;areusedtoliving;
　　operating;attacks;patient;improving;blind;care;indeed;education;international;medical;
　　Bbe;Cgoing;CblindnessBnot;Aare;Bdrink
　　練習(xí)二十二
　　CBEADF
　　careless;thelongest;itself;elderly;treeplanting;unable;further;busier;
　　BBCBCCCBBD
　　練習(xí)二十三
　　join;tough;trail;aim;experience;happen;developfund-raising
　　spirit;improve;excellent;violin;Februally;experience;especially;record;
　　singing;writing;isheld;join;toraise;hasbeenbuilt;toslove;wassinging;called;playing;
　　去掉it;去掉been;across----cross;finished---beenover;becauseof;helping;drinks;drinking;bringing;but去掉
　　練習(xí)二十四
　　don't;will;Itdifficultto;moreanyother;Howcanhelp;willberecorded;with;For;without;on;in;of;By;to
　　It'swrongtolookdownonpoorpeople.
　　Itisagoodseasonforustoenjoythebeautifulview.
　　It'snecessarytobecarefulwhenyoucrosstheroad.
　　Don'tmissthechanceyoushouldhelpeachother;
　　It'simportantforchildrentohavesupportfromparents.