来自李立持的问题
【TheprocessofproducingelectricitymayalsogiveoutCO2，_______youheatyourhousewithelectricityinsteadofcharcoal．（）A.evenifB.aslongasC.asifD.assoonas】
The process of producing electricity may also give out CO2，_______ you heat your house with electricity instead of charcoal．（）
A.even if
B.as long as
C.as if
D.as soon as
