单项选择题
Ethanol is commonly used as a gasoline supplement, but it is currently about（）methanol.
A.twice as expensive as
B.twice as more expensive as
C.as twice more expensive as
D.as twice expensive as
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相关考题
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单项选择题
At a rough estimate,Nigeria is（）Great Britain.
A.three times as big as
B.three times as bigger as
C.as three times big as
D.as three times gigger as -
单项选择题
There is a serious liability（）performance and fuel efficiency.
A.in time of
B.in case of
C.in terms of
D.in honour of -
单项选择题
Although recent years have seen（）reductions in noxious pollutants from individual motor vehicles, the number of such vehicles has been steadily increasing.
A.substantial
B.substance
C.submit
D.subjective
