高级英语写作泛读材料主题句Exercise1Readthefollowingparagraphandanswerquestionsafterit.Usingaspellcheckeronacomputercanbeagreatadvantageforawriter.First,thewritercancheckthespellingofmanyofthewordsinthepaper.Thespellcheckertriestomatchthespellingofthewordwithawordinitsdictionary.Manyspellcheckershaveatleast100,000wordsintheirdictionaries.Second,thewritercanaskthespellcheckertosuggestaspelling.Ifthewordisalreadyspelledcorrectly,thewritercanasktheprogramtoignorethesuggestedspelling.Ifthewordismisspelled,thewritercanrequestthattheprogramcorrecttheerror.Manywritersrelyonspellcheckerstoimprovetheaccuracyoftheirwriting.1.Whatisthetopicoftheparagraph?2.Underlinethetopicsentence.(Suggestedanswer:ThetopicisThespellchecker;Thetopicsentenceis:Usingaspellcheckeronacomputercanbeagreatadvantageforwriter.)Exercise2Comparethefollowingsentencesandfindwhichonesarebettertopicsentences?1.A.TherearemanythingsthatmakelearningEnglishlanguagedifficult.B.WhatmakesEnglishparticularlydifficulttolearnispronunciation.2.A.Enrollingincollegeisnotaneasytask.B.RegistrationatStateCollegeisapainfulprocess.3.A.TheactinginGonewiththeWindwassuperb.B.GonewiththeWindmaybeanoldmovie,butitisstillagoodmovie.4.A.Thefirstyearofcollegeisdifferent.B.Thefirstyearofcollegeismoredemandingthanhighschool.5.A.Myfriend,Evelyn,isverycompetitive.B.IhaveafriendnamedEvelyn.6.A.Mysterynovelsarefuntoread.B.TheplotofthenovelMayTomorrowNeverComeissuspenseful.7.A.Spinachisanexcellentsourceofiron.B.Animportantstepinpreventingheartdiseaseiseatingfruitsandvegetablesdaily.(SuggestedAnswers:1.B2.B3.A4.B5.A6.B7.B)(提示：→主题句的范围不应太宽或太窄，既要使作者有发挥的空间，有话可说，又要使作者能在段落有限的长度内完整、清楚地完成相关的描述、说明或评论。请看下面三个主题句)1)Everyonehasahometown.(范围太宽，意图不明确)2）Thenewbrandsellsat$5.00apack.（只交代了一个事实，没有发挥的余地3)Smokingcigarettecanbeanexpensivehabit.（可以围绕anexpensivehabit加以详尽的说明，是一个恰当的主题句。→）主题句还应是具体的，抽象、笼统或模糊的表达不能有效地指导段落的写作。例如:Drinkingcoffeeisbad.这句话既有主题--drinkingcoffee，也又要点，bad，但是意思比较含混模糊，会让读者产生许多疑问，如：喝咖啡对什么人不好？是否对任何人都会产生副作用？而这些问题不太容易在一个段落中完整、全面地讲清楚。因此要点应