MSG(monosodiumglutamate)isafoodadditive(食品添加剂),whichhasbeenwidelyusedbymanyfoodfactoriesallovertheworldsinceitappearedfirstinJapanin1909.MSGisasubstancethatisaddedtosomefoodtoimproveitsoriginal(原先的)tasteandcolour.Itisusedinfoodsaroundtheworldsuchascakes,bread,frozenmeats,fishandvegetables.Inthebeginning,peoplethoughtMSGwassafejustlikesaltandsugar.However,in1968somepeoplereportedtheyseemedtohavebadreactions(反应)toMSGafterhavinghadamealatarestaurant.Theyincludedheadachesandquickheartbeat(心跳).ItwasalsoreportedthatMSGexcitedaperson’sbrainandcausedhisdeathinJapan.ScientiststhinkthatMSGmayleadtomanyneurologicaldisorders(神经紊乱).Inmicestudiesdonebyauniversity,theevidenceshowedthemicedidn’twanttoeatthefoodincludingMSG.Todaymanyfoodcompanies“hide”MSGonfoodlabels(标签)byusingdifferentnames.Ifyousee“naturalflavorings”,“hydrolyzedprotein”and“spices”inafoodlabel,youareprobablyseeingahiddenwayto“report”MSGinafoodlabel.Everytimewehaveamealinarestaurant,wealwaysfeelthefoodverydelicioustotaste,butsometimesitisdangerousforourhealthbecausesomepoisonousfoodadditiveshavebeenaddedtothefood.Toprotectpeople’shealth,ourgovernments,fromcentraltolocal,aretakingactionstostopfactoriesproducingpoisonousfoodadditives.小题1:MonosodiumGlutamateis_______A．afoodB．anadditiveC．afactoryD．acountry小题2:MSGisoftenusedin______.A．frozenmeatsB．cupsC．clothesD．bookcovers小题3:Theexamplesinthesecondparagraphtellus________. 　　A．thefoodincludingMSGisdeliciousB．peopleliketoeatinarestaurantC．micelikeeatingthefoodincludingMSGD．MSGisnotsafesometimes小题4:Ifyousee“naturalflavorings”,“hydrolyzedprotein”and“spices”inafoodlabel,youwillknow­­­­­­­_____________.A．youmusteatthefoodinahiddenwayB．thefoodlabelmustbehiddenC．MSGisprobablyaddedtothefoodD．youmustreportthefoodtoyourparents小题5:Theunderlinedword“substance”inthearticlemeans__________.A．colourB．materialC．tasteD．food 　　小题1:B小题1:A小题1:D小题1:C小题1:B 　　【主旨大意】本文介绍了味精的优点和害处。小题1:从短文第一句“MSG(monosodiumglutamate)isafoodadditive”得出答案。小题1:从这句话“Itisusedinfoodsaroundtheworldsuchascakes,bread,frozenmeats,fishandvegetables.”得出答案。小题1:从此句“ScientiststhinkthatMSGmayleadtomanyneurologicaldisorders(神经紊乱).”得出答案。小题1:从这一句“Ifyousee“naturalflavorings”, “hydrolyzedprotein”and“spices”inafoodlabel,youareprobablyseeingahiddenwayto“report”MSGinafoodlabel.”得出答案。小题1:根据句意，得知意为“物质”。