The process of producing electricity may also give out CO2, ______ you heat your house with electricity instead of charcoal.
A．a(chǎn)s long asB．a(chǎn)s soon asC．a(chǎn)s ifD．even if
D
考查短語辨析。句意為：產(chǎn)生電的過程也會發(fā)出二氧化碳，即使你用電而不是用木炭加熱你的屋子。故答案為D。
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