求教og13 sc 10

10. The widely accepted big bang theory holds that the universe began in an explosive instant ten to twenty billion years ago and has been expanding ever since.

(A) that the universe began in an explosive instant ten to twenty billion years ago and has been expanding

(B) that the universe had begun in an explosive instant ten to twenty billion years ago and had been expanding

(C) that the beginning of the universe was an explosive instant ten to twenty billion years ago that has expanded

(D) the beginning of the universe to have been an explosive instant ten to twenty billion years ago that is expanding

(E) the universe to have begun in an explosive instant ten to twenty billion years ago and has been expanding

A选项中and 前后的began与has been expanding形式并不一致，为什么A选项还是正确的

不应该是structurally和logically都要平行才对吗？

10. The widely accepted big bang theory holds that the universe began in an explosive instant ten to twenty billion years ago and has been expanding ever since.

(A) that the universe began in an explosive instant ten to twenty billion years ago and has been expanding

(B) that the universe had begun in an explosive instant ten to twenty billion years ago and had been expanding

(C) that the beginning of the universe was an explosive instant ten to twenty billion years ago that has expanded

(D) the beginning of the universe to have been an explosive instant ten to twenty billion years ago that is expanding

(E) the universe to have begun in an explosive instant ten to twenty billion years ago and has been expanding

A选项中and 前后的began与has been expanding形式并不一致，为什么A选项还是正确的

这样的话 E 的解释也是不完善的么？

E 的解释是 The verb phrases "to have begun" and "has been expanding" both reference the same subject of the clause, "universe", and therefore need to be parallel.

只是简单的说2者都在指universe，所以要parallel

E 应该是错在" the universe to have begun "的 to 有问题吧....