◎ 题干
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
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“The process of producing electricity may also give out CO2, _____ you heat your house with electricityinstead of charcoal. [ ]A. even if B. as long as C. as …”主要考查了你对  【从属连词】【状语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。