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We are confident that the environmenr       by our further efforts to reduce pollution
A.had been improvedB.will be imrovedC.is improvedD.was improved
B.
句意:我们相信我们进一步减少污染的努力将会改善环境状况。根据题干中主句是将来时,还有空后的further判断此处应用将来时。
【考点定位】考查时态和语态。
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