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【题目】According to a UN report, people ________ goodbye to 52% of the world’s animals in the past 40 years.

A.saidB.have saidC.were sayingD.had said

【答案】B

【解析】

本题考查时态。解题步骤:1.确定时态:in the past 40 years作时间状语时,主句谓语动词要求使用现在完成时;2.确定句意:根据一份联合国的报告,在过去的40年中,人们已经和世界上52%的动物告别了。故选B

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