People are _________the use of alternative energy sources. Because the fossil fuels _________will be used sooner or later.A.pushing for/ consumedB.struggling for /being consumedC.pushing for/ being consumedD.preferring /being used
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C解析此题意为：人们急切要求使用替代能源。因为正在消耗的矿物燃料早晚有一天就要用完。push for意为“急切、强烈地要求”；而fossil fuels是“消耗consume”的宾语，故应用被动结构。所以此题选C.