Whydopeoplesmoke?Onereasonisthatpeoplebecomeaddicted(成瘾)tocigarettes.Theaddictivesubstance(物质）incigarettesisnicotine(尼古丁).Whenpeoplesmokethenicotinegoesrightintothebloodstreamandmakesp

Whydopeoplesmoke?Onereasonisthatpeoplebecomeaddicted(成瘾)tocigarettes.Theaddictivesubstance(物质）incigarettesisnicotine(尼古丁).Whenpeoplesmokethenicotinegoesrightintothebloodstreamandmakespeoplefeelcomfortable.Asmoker'sbodygetsusedtothenicotineandifhestopssmokinghefeelsnervous.Manysmokerstrytostopsmokingbutbecauseoftheaddictiontonicotinetheyfeelsouncomfortablethattheyoftenfindittoodifficulttodoso.

Anotherreasonisthatpeoplesimplyenjoysmoking.Havingacigaretteformanypeoplemeanstakingabreak.Forsomepeoplesmokingbecomespartofcertainsocialrituals(礼仪)forexamplesendingthecigaretteafterdinner.Manypeopleenjoysmokingbecauseitgivesthemsomethingtodowiththeirhands.Reachingforacigarettelightingitandflicking(弹掉)theashesarespecialcomfortinasituationwheretheyfeelnervous.

Manypeoplealsolikethetasteoftar(焦油)incigarettes.Howeveritisthetarthatcausescancer.Whilegovernmentsandhealthexpertshavetriedtogetpeopletogiveupsmokingcompletelycigarettemanufacturers(生产商)havetriedtokeepsellingthembyproducingcigaretteswithlesstar.Manypeopleinwesterncountrieshavewelcomedthesecigarettessincetheyfoundithardtostopsmokingandwantedtoreducethedangertotheirhealth.

62.Accordingtothepassagewhatgetspeopleintothehabitofsmoking?

A.Thecigarette. B.Nicotine. C.Tar. D.Blood.

63.Whatdotheunderlinedwords"todoso"mean?

A.Theymeans"tostopsmoking".

B.Theymeans"tomakepeoplefeelcomfortable".

C.Theymeans"togetusedtothenicotine".

D.Theymeans"tobecomeaddictedtocigarettes".

64.Whydopeoplewelcomelow-tarcigarettes?

A.Becausetheytastebetter. B.Becausetheyarecheaper.

C.Becausetheyarelessharmful. D.Becausetheyareeasytobemade.

65.WhichofthefollowingsentencesisTRUEaccordingtothepassage?

A.Smokerscontinuesmokingbecausesmokingisveryinteresting.

B.Tarincigarettescausescancer.

C.Inordertolookcoolmanypeopleenj