4. GWD25-Q4.

Recent findings lend strong support to the theory that a black hole lies at the center of the Milky Way and of many of the 100 billion other galaxies estimated to exist in the universe.

A.
that a black hole lies at the center of the Milky Way and of

B.
that a black hole lies at the Milky Way’s center and

C.
that there is a black hole lying at the milky Way’s center and

D.
of a black hole lying at the Milky Way’s center and

E.
of a black hole that lies at the center of the Milky Way and of

A

       答案选A，可是如果选A的话，根据句意A就是 一个黑洞在银河系的中间而且在其他100 billion个估计存在于宇宙中的银河中间。  这样的逻辑意思有问题啊，一个黑洞怎么又在这里有在别的星系呢？   B 说黑洞在MW中间，而且宇宙中预计存在其他100 billion个其他的galaxies。这样的表示感觉合理一些。 请nn指点。

为什么只能有一个黑洞？到处都可以有黑洞的。

A 绝对正确的。Milky Way 是死物，不应该用 's。

可能是我没说清楚，我认为A是在说一个黑洞，即在MW,又在其他100 billion个galaxies那里，所以不合逻辑。

这里不是说只有一个黑洞，而是有省略：
Recent findings lend strong support to the theory that a black hole lies at the center of the Milky Way and of many of the 100 billion other galaxies estimated to exist in the universe. 如果扩展后，就是这样的：
Recent findings lend strong support to the theory that a black hole lies at the center of the Milky Way and [that a black hole lies at the center] of many of the 100 billion other galaxies estimated to exist in the universe.
扩展部份仍然用 a blackhole 是因为每个银河系里面只有一个黑洞，而不是有几个。

LS正解
尝试翻译一下：
最近的findings强烈地支持了这样一个理论：黑洞存在于银河的中心以及别的很多估计存在与宇宙的星系中