【正文】 they in the fact…teenagersstudents14. Some people suggest that the fault is with who… . But it doesn’t explain…they are only partly right considerabledrasticmarkedsweepingfavourableundesirablecauseproducebring aboutchangerise15. It may a in…數(shù)字的表達(dá)句型：increasedrosejumpedshot upfrom 5 to 10 percent of the totalto 15 percentby 15 percent1. In 1990, it from 10 to 5 percentto 15 percentby 15 percentdecreaseddroppedfell2. By parison with 1990, it nearlyalmostmore thanfigurepercentagenumberpopulationpared withas pared withas againstdoubledtripled3. The has thatof last year.two and a half timestwicesix timesalmostmore thanaboutdroppedincreaseddecreased4. It has , pared with…twice4 timeshalfnumberpercentage5. The is as much as that of 1990.the recent 5 yearsthe past few years1992something of a plateau50 percentto an average of 50 percentreachedapproachedrisen to6. It has in in .7. It accounts for 15 percent of the total…26 traffic accidents26 teenage suicidesa 26 percent increase \decline in birth rateswaswerehas been8. There in March, up from 20 percent for the same period last yearan increase of 3 percent in a threemonth periodonly births per 1000 females of childbearing age . That is the upwarddownwardsecondhighestsecondlowest rate in history, continuing a trend begun in the 1970s.onlyless thanmore thanalmostaboutoveras many asthreequarters40 percent ofone out of fiveone in fourcollege populationgraduateshousewives 9. By 1990, ,preferred tolikedlast year1980as againstas pared with , …less thanmore than15 percent\15 per thousandnumberrate10. The was , halfthird\quarter a(n) of the 1990 total.開(kāi)頭句型：下面是文章起頭常用的一些句型，掌握這些句型，有助于你較快、較好地寫(xiě)好文章起頭。下面就將這些句型做一個(gè)分類(lèi)總結(jié)：提出觀點(diǎn)　　1. When asked about…, most people say… But many other people regard…as… I personally think…　　當(dāng)被問(wèn)及對(duì)……有什么看法時(shí)，大多數(shù)人認(rèn)為……但是，還有很多人認(rèn)為……我個(gè)人認(rèn)為……　　2. When it es to…, some people think that… Others argue that the opposite is true. There is probably some truth to both arguments, but…　　涉及……這一問(wèn)題，有的人認(rèn)為應(yīng)該……另一些人持相反意見(jiàn)?！　v史上，……的問(wèn)題從來(lái)沒(méi)有比現(xiàn)在更加突出?！　?0. Years of observing human behavior has enabled me to conclude that the major difference between…and…lies solely with…　　對(duì)人們行為的多年觀察使我能夠得出這樣的結(jié)論：……和……的主要區(qū)別僅僅在于……　　11. There has been undesirable trend in recent years towards… A recent survey showed that…percent of respondents ranked…as their top priority, pared to…percent only a few years ago. Why do people fail to realize that…?　　近年來(lái)出現(xiàn)了對(duì)社會(huì)有害的……傾向?！膯?wèn)題令人深感遺憾，它已經(jīng)引起了全國(guó)公眾的關(guān)注?！　∪藗兤毡檎J(rèn)為，……的增長(zhǎng)是經(jīng)濟(jì)發(fā)展的必然結(jié)果。 Equate success with one‘s character 寫(xiě)作句型三： According to a recent survey ，fourmillion people die each year from diseases linked to ，每年有4，000，000人死于與吸煙相關(guān)的疾病。 People seem to fail to take into account the fact that the serious pollution is binging abour harm to people‘s health. 寫(xiě)作句型七： Many experts point out that physical exercise contributes directly to a person‘s physical 。然而，對(duì)多數(shù)年輕人來(lái)說(shuō)，校園剛開(kāi)始的日子并不是什么愉快的經(jīng)歷。 The lastest survey show that… 寫(xiě)作句型五： No invention has received more praise and abuse than 。　　論證觀點(diǎn)　　1．表示原因 　　1）There are three reasons for this． 　　2）The reasons for this are as follows． 　　3）The reason for this is obvious． 　　4）The reason for this is not far to seek． 　　5）The reason for this is that．．． 　　6）We have