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 考古學(xué)家們上周宣布他們已經(jīng)從中國西南的四川省眉山市閩江支流江口發(fā)掘出三萬多件遺物．

解答 答案：A句中announce的動(dòng)作發(fā)生在過去，excavate的動(dòng)作發(fā)生在announce之前，是過去的過去，要用過去完成時(shí)態(tài)來構(gòu)成．故選A．

點(diǎn)評(píng) 表示過去某一時(shí)間或動(dòng)作以前已經(jīng)發(fā)生或完成了的動(dòng)作對(duì)過去的某一點(diǎn)造成的某種影響或是結(jié)果，用來指在另一個(gè)過去行動(dòng)之前就已經(jīng)完成了的事件．它表示動(dòng)作發(fā)生的時(shí)間是"過去的過去"，側(cè)重事情的結(jié)果．

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