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15.   Astronomers studying the newly discovered star say that it provides clues about our galaxy’s origin, that it may supply data about how fast our galaxy is expanding, and moreover it is perhaps the most distant star in the entire Milky Way.

(A) about how fast our galaxy is expanding, and moreover it is perhaps

(B) regarding the speed our galaxy expands at; moreover, they think it may be

(C) about how fast our galaxy expands and perhaps be

(D) on the galaxy’s expansion rate and perhaps（E）

(E) about how fast our galaxy is expanding, and that it is perhaps

为什么不是A?

it supply A,and B 楼主注意Ａ和Ｂ都是做为supply的宾语。

Ｅ中Ａ为about引导的一个短语，Ｂ为that从句，虽然总觉得AB的平行结构长的较丑，但他还是成立的。

Ａ中Ｂ前没有that，那么moreover it is perhaps就是和 it may supply data 平行。这样句意就是错误的。楼主读读看

我觉得是否可以这样理解:

...say that it provides clues about our galaxy’s origin, that it may supply ...,  and that...

E中的and that级别是很高的,与前两个that平行

LS的MM的解释是正确的~~