单选题
—Why do you drink so much coffee? —Well, ______ it doesn't keep me awake at night, I see no harm in it.
A、
for
B、
as far as
C、
as long as
D、
although
【正确答案】
A
【答案解析】
前一句问的是Why，回答的应该是原因。而四个选项中只有 for可以引导状语从句。[B]asfaras一直到，[C]aslongas只要。
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