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whAt DoEs thE proFEssor imply whEn hE sAys this:A．thE CAtErpillAr’s liFE purposE is Almost ComplEtE.
B．thE CAtErpillAr will soon EmErgE From thE pupA、
C．thE CAtErpillAr hAs migrAtED to A nEw hABitAt.
D．thE CAtErpillAr is ABout to lAy its Eggs.