题目内容
The process of producing electricity may also give out CO2, _____ you heat your house with electricity
instead of charcoal.
instead of charcoal.
[ ]
A. even if
B. as long as
C. as if
D. as soon as
B. as long as
C. as if
D. as soon as
A
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目