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19.Archeologists announced last week that they_______more than 30,000 relics from the Jiangkou stretch of the Minjiang River in Meishan city,Southwest China's Sichuan province.(  )
A.had excavatedB.excavated
C.have excavatedD.have been excavating

分析 考古学家们上周宣布他们已经从中国西南的四川省眉山市闽江支流江口发掘出三万多件遗物.

解答 答案:A句中announce的动作发生在过去,excavate的动作发生在announce之前,是过去的过去,要用过去完成时态来构成.故选A.

点评 表示过去某一时间或动作以前已经发生或完成了的动作对过去的某一点造成的某种影响或是结果,用来指在另一个过去行动之前就已经完成了的事件.它表示动作发生的时间是"过去的过去",侧重事情的结果.

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