OG12 SC-111

Construction of the Roman Colosseum, which was officially known as the Flavian Amphitheater, began in A.D. 69, during the reign of Vespasian, was completed a decade later, during the reign of Titus, who opened the Colosseum with a one-hundred-day cycle of religious pageants, gladiatorial games, and spectacles.

A.which was officially known as the Flavian Amphitheater, began in A.D. 69, during the reign of Vespasian,

B.officially known as the Flavian Amphitheater, begun in A.D. 69, during the reign of Vespasian, and

C.which was officially known as the Flavian Amphitheater, began in A.D. 69, during the reign of Vespasian, and

D.officially known as the Flavian Amphitheater and begun in A.D. 69, during the reign of Vespasian it

E.officially known as the Flavian Amphitheater, which was begun in A.D. 69, during the reign of Vespasian, and
不明白OG对D选项的解释，OG说 Roman Colosseum已经试最后一个动词即was completed的主语了，这是什么意思？was completed的主语难道不是construction吗？

如果把D带入原题 变成：
Construction of the Roman Colosseum，（officially known as the Flavian Amphitheater and begun in A.D. 69）, during the reign of Vespasian it 这里的括号部分都是修饰语，而且是两个v-ed分词并列去修饰主语Construction，（虽然我个人不觉得begun在这里用v-ed是正确的）结果后面又马上出来一个it，这个是不是多余啦？
你若是疑惑于谁是主语，当然construction是主语，但是这里construction of RC 可以看作是一个整体吧。我想说Roman Colosseum罗马斗兽场本身也是建筑，它不是一个地名，或者有别于建筑的东西。大家说罗马斗兽场说得就是那个建筑呗。所以这里应该都一样的。
一家之见，欢迎指正～

嗯。确实begun和known的叙述对象并不一致，所以不要并列。而且明显began和was complete才是完美并列搭配，都是讲述建筑什么时候建什么时候结束的。

嗯。确实begun和known的叙述对象并不一致，所以不要并列。而且明显began和was complete才是完美并列搭配，都是讲述建筑什么时候建什么时候结束的。