Cats’senseofsmellisveryimportanttotheirhealth.Manycatownershaveseenacatsmellthefoodandrefusesit.Carefulsniffingtellsthecatifsomethingissafetoeat.

Catshaveapairofvomeronasalorgans(犁鼻器)ontheroofofthemouth.Whenthecatwantstosniffshewillbreathetheairinthroughhermouth.Atthismomentshewilloftensquint(斜视)hereyesandmaybeevenflatten(使…平坦)herears.Thismakesherlooklikesheismakingfaces.Thevomeronasalorganswillthenanalyzethesmell---almostasifthecatistastingthesmell.

Whenyoucomehomefromoutsidethehouseyourcatcansmellwhatyouhadforlunchandforamid-afternoonsnack.Shecansmellthepeopleyoushookhandswithandyourneighbouryoustoppedtotalktoandhug.Shecansmellthegrassbroughtunderyourshoesasyoutookashortcutacrossthelawn.Yourcat’ssenseofsmellissogoodthatshecansmelldifferencebetweenagallonofwaterwithateaspoonofsaltinitandplainwater.Incomparisonwethinkofsaltascompletelytasteless.

Catshavescentglands(臭腺)oneachsideoftheforeheadonthechinthelipsandnexttothetail.Whenyourcatrubsupagainstyourhandyourlegthesofaandyourbedsheisleavingherscentinthosethings.Shewillthenusehersenseofsmelltorecognize“her”thingspeopleandevenotherpetsinthehome.

Ifyouwanttohavefunwithyourcat’ssenseofsmelltakesomesmallbitsofdifferentthingssuchasabitofchickensomeflowersandsomefish.Placeeachdifferentscentunderapieceofpapertowel(soyourcatcannotseeanyofthem)andencourageyourcattoinvestigateandfindwhatkindoffoodshelikestoeatbest.

1.Catsknowwhetherthefoodisfittoeatornotwiththeir____________.

A.senseoftouchB.scentglandsC.organsofsmellD.senseoftaste

2.Thethirdparagraphwaswrittenmainlytoprovethat_____________.

A.catsareverysmart

B.catshaveagoodsenseasdogs

C.saltywaterhasaspecialsmell

D.cats’senseofsmellisexcellent

3.Whatdoesyourcatdowhenitrubsagainstyourfoot?

A.Sheputsherscentonit.

B.Sheshowsrespecttoyou.

C.Sheasksyoutoplaywithher.

D.Shesmellswhereyouwerejustnow.

4.Whatdoest