By thE timE I FinishED high sChool, my intErEst in AnimAls hAD grown, AnD EnrollED At A univErsity to stuDy Biology. I lEArnED soon Enough thAt stuDying AnimAls __56__ this lEvEl wAs not in thE AnimAls BEst ___57. I rEmEmBEr onE miDtErm ExAm in ___58 EACh stuDEnt wAs hAnDED A lArgE, FrEshly-killED Frog AnD __59 to DissECt (解剖) AnD mArk A sEt oF BoDy pArts. I lookED At thE ___60 Frog in Front oF mE AnD wAs sADDEnED thAt hEr liFE wAs ___61 AwAy For suCh A slight ___62.
A、yEAr lAtEr, in thE sAmE lAB __63 I DissECtED thE Frog, I pErFormED A smAll ACt oF AnimAl ___64. WE wErE ___65 on Fruit FliEs, AnD it wAs timE to rECorD thE DistriBution oF ChArACtEristiCs in thEir nExt gEnErAtion. FliEs wErE ___66 in smAll plAstiC BottlEs.Counting thE numBEr oF FliEs with whitE or rED EyEs rEquirED First Exposing thEm to EthEr(乙醚) ___67 thEy CoulD not movE. ThE FliEs wErE thEn sprEAD onto A piECE oF whitE pApEr ___68 AnD CountE
D、WhEn thE DAtA CollECtion wAs ___69, thE FliEs hAD no FurthEr usE, AnD our instruCtions wErE to ___70 thEm into A smAll glAss Dish oF oil At thE CEntEr oF EACh DEsk, whiCh wAs to BE thEir FinAl rEsting ___71. OnCE mAy littlE pilE oF FliEs hAD BEEn CountED, I pushED thEm oFF thE EDgE oF thE pApEr.As wE rECorDED our DAtA, I kEpt onE EyE___72 thEm. Within minutEs thE pilE wAs humming(嗡嗡叫) As tiny lEgs AnD wings BEAt thEir wAy out oF thE EthEr Fog. I wAs ExtrEmEly ExCitED As thEy ___73 Flight. ThAt wAs my First ___74 in rEFusing to ConDuCt sCiEntiFiC rEsEArCh thAt trEAtED nonhumAn liFE in A(n) ___75 wAy.
A、stEp
B．rEviEw
C．glAnCE
D、gEsturE