单选题
I spent the whole day yesterday rearranging my books ______ their subjects and frequency of use.
A、
as regards
B、
as against
C、
as of
D、
as from
【正确答案】
A
【答案解析】
[解析] as regards按照；as against与……对照，相比；as of从……开始；as from从……开始。
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