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The world's supplies of oil _____ gradually ______ up with t

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The world's supplies of oil _____ gradually ______ up with the development of industry and the increase of cars.
A.is ; used B.are being; used C.has; used D.have been; using
B 原因 主语是supplies复数 所以排除AC,D错在been used而不是been using,因为这里是被动,石油储备被用完