Chrisisnotatraditionalexplorer---heusually（61）___（work）inanofficeforalargeorganization．Yethisjobcansometimesbejust（62）___excitinganddangerousasbeinganexplorer．
ChrisisadoctorfromFranceandheworksforMSF，（63）___isalsoknownasDoctorsWithoutBorders．MSFsendstraineddoctorsallovertheworld （64）___（help）peopleafterawaroradisaster．TheorganizationreceivedtheNobelPeacePrizein1999．
Eachyear，morethan2，300internationalstaffjoin （65）___（they）34，000locallyhiredcolleaguestoprovidemedicalaidincountriesaroundtheworld．AllkindsofdoctorscanvolunteerforMSF．Theyneedtobe （66）___（prepare）togoalmostanywhereand，ofcourse，theyshouldexpectdifficultconditions．WhenMSFacceptsadoctorforatask，hehastogofor（67）___leastsixmonths．
When （68）___（ask）whyheleftacomfortablelifeandagoodsalarytojoinMSF，Chrissaid，"TheexperienceIgainisagreathelpinyourcareer．Most （69）___（important），itisgreattoknowattheendofeachtask，Ihavemadeareal （70）___（different）topeople'slives．"