gwd-17-20

Q20: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.

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

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

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

the answer is C,but B seems reasonable

B的begun不好，过去分词做修饰的话，and之前只有主语，没有谓语动词了

Construction of the Roman Colosseum，【officially known as the Flavian Amphitheater】修饰【Roman Colosseum, begun in A.D. 69】过去分词修饰Construction, 【during the reign of Vespasian】状语,and+谓语

这个结构里，and之前没有谓语动词，只有主语

Cbegan是过去式，作为动词

结构 Construction of the Roman Colosseum。。。。began。。。and was  completed 。。。。。。

谢谢楼上，我没有看清B是begun ，以为是began，如果B是began 应该可以选b吧

MD,我也是没看清楚,比了好几次都觉得B,C除了第一句都一样

大家有没有想这题中同谓语和which从句的区别？

我的理解是，which这里指代the Roman Colosseum，根据which的指代原则（就近和逻辑意思）很清楚。

而B中同谓语officially known as the Flavian Amphitheater只能修饰逗号前主语construction,错

open to discuss

我也是这么认为的。不知道其他人对于这个知识点有什么高见？

yes