【題目】By the time they arrived, the enemy forces _______, leaving the small village destroyed.

A.withdrawB.will withdrawC.are withdrawingD.had withdrawn

【答案】D

【解析】

考查動詞時態(tài)。句意:在他們到達(dá)之前,軍隊已經(jīng)撤離,離開了被破壞的小村莊。分析句子成分可知,句中By the time they arrived意為在他們到達(dá)之前為時間狀語,是完成時的標(biāo)志,且arrived為過去某一時間發(fā)生的事,因此使用過去完成時形式。故選D項。

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