listEning 8 "EnvironmEntAl sCiEnCEClAss"
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whAt is thE proFEssor’s AttituDE towArD FuEl CElls
A、hE thinks thAt thE tEChnology is not vEry EFFiCiEnt.
B、hE is hopEFul ABout thEir DEvElopmEnt in thE FuturE.
C、hE is DouBtFul thAt FuEl CElls will rEplACE Fossil FuEls.
D、hE is DisCourAgED BECAusE oF thE DElAys in proDuCtion.