本題考「分詞構句」概念。
原文為Because the actor had completed another film,he immediately working on a new one.省略Beacuse後,前主詞與後主詞皆為一樣故又省略前主詞"the actor"
兩個過去動作先後發生,較早發生的用過去完成式,較晚發生的用過去簡單式原始句為:Because the actor had completed another film, the actor immediately began working on a new one. (主詞相同時,可以省略連接詞和主詞,使用分詞構句,主動用V-ing,被動用p.p)
43.Having ______ another film, the actor..-阿摩線上測驗