Recent finding 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 exit 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 ablack 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)
為什麼這題是a
不懂a選項and 後面的of
是that a black hole lies at the center of the Milky Way and (that a black hole lies at the center) of 的意思嗎
但是這樣的意思怎麼感覺怪怪的