In Britain,sales of cigarettes have been reduced __________ 30% in the past ten years.
A．forB．toC．fromD．by
D
to表示增加、減少、降低到什么程度,一般包括底數(shù)在內(nèi)。by表示增加或減少的凈數(shù),不包括底數(shù),常可省略。句意:在英國,過去十年中,煙的銷量下降了30%。
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