题目内容：
回答题：UsingHIVVirustoCureCancer
Scientistsareplanningtousehumanimmunodeficiency（免疫缺陷）virus（HIV）,oneofmankind'smostfearedviruses,asacarrierofgeneswhichcanfightcancerandarangeofdiseasesthatcannotbecured.TheexpertssayHIVhasanalmostperfectabilitytoavoidthebody'simmune（免疫的）defenses,makingitidealforcarryingreplacementgenesintopatients'bodies,accordingtotheobserver.
AteamattheCalifornia-basedSalkInstitute,oneoftheworld’sleadingresearchcentersonbiologicalsciences,hascreatedaspecialnewbreedofHIVandhasstartednegotiationswiththeU>S>FoodandDrugAdministration（FDA）tobeginclinicalgenetherapy（治疗）trialsthisyear.ThefirsttrialsareexpectedtoinvolvepatientssufferingfromcancersthatcannotbecuredbysurgeryalthoughprojectleaderProfessorInderVermasaidtheHIVtechniquewouldhave”farwiderapplications”.
Theplanremainsverylikelytocausecontroversysinceitinvolvesmakinguseofaviruswhichhascausedmorethan22milliondeathsaroundtheworldinthepasttwodecades.VermasaidthattheideaofusingHIVforabeneficialpurposewas“shocking”butthefiercenatureofHIVhaddisappearedbyhavingallsixofthepotentiallydeadlygenesremoved.
Illnessessuchasvariouscancersarecausedwhenageneinapatient’sbodyfailstoworkproperly.Inthepasttwoyears,breakthroughsingenetics（遗传学）haveledgenetherapyscientiststotryandreplacethegenesthatdonotfunctionnormally.
Unfortunately,thebody’simmunedefenseshavebeenknowntoattackthemodifiedgenesandmakethemlosetheir effects before they can start their task and progress in the field has been held up by the lack of a suitable carrier.
the hiv virus has the ability to escape from。and then destroy，the immune defense cells designed to protect our bodies and this makes it attractive to scientists as a way of secretly conveying replacement genes into patients'bodies.
fda has approved the plan of using hiv to cure cancer in humans
A．right
B．wrong
C．not mentioned
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