单选题
The coal output last year was ______ five years before.
A、
as much as twice
B、
twice as much as
C、
twice so much as
D、
as twice much as
【正确答案】
B
【答案解析】
[解析] 英语中有三种倍数表达法：①倍数+as+adj./adv.+as；②倍数+the+名词(length，size，weight，width，depth等)+of；③倍数+比较级+than。B项符合第一种用法。故选B。
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