题目内容：
听音频，回答题 Atrainedsnifferdogcanfindhiddendrugsorearthquakesurvivorsandevendetectcancer.Wemightnothaveasgoodasenseofsmellasdogs,butwestillfollowournoses.26andsmellthecoffee!Somethingsmellsfishy.Shehasanosefora27.TheEnglishlanguageisfullof28todowithsmell,andmanyofthemshowhowimportantsmellistooursenseof29.
Andthat'snotsurprising,becauseasenseofsmellisveryusefulintellingwhenfoodisoff,orclothesneed30.,forexample.Butmillionsofpeoplecan'tsmellanythingatall:touseamedical31,theyare"anosmic(嗅觉缺失)".IntheUKalone,around3millionpeopleareanosmic,butthecountry'sfirstclinictohelpthemhasonlyrecentlybeen32.
Sohowdopeoplelosetheirsenseofsmell?Somepeoplearebornthatway,theyarecongenitally(天生的，先天的)anosmic.Otherslosetheirsenseofsmellbecauseofahead33,orillness.
It'snotonlyscentswhicharemissingforpeoplewithanosmia.Foodanddrinklosetheirappealtoo,becausesmell34around80%ofoursenseofflavour.Theycan'ttasteherbs,spicesorgarlicandfruitandwinesimplytastesour.Anosmiacanalsobedangerous.Peoplewiththeproblemcangetfoodpoisoning,becausetheycan'tsmellwhenfoodisbad.Theycan'tsmellsmokefromahousefire,or35.
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