OG 49. The cameras of the Voyager II spacecraft detected six small, previously unseen moons circling Uranus, which doubles to twelve the number of satellites now known as orbiting the distant planet (A) which doubles to twelve the number of satellites now known as orbiting (B) doubling to twelve the number of satellites now known to orbit (C) which doubles to twelve the number of satellites now known in orbit around (D) doubling to twelve the number of satellites now known as orbiting (E) which doubles to twelve the number of satellites now known that orbit
doubling 修饰detect动作,
而这题doubling the number reported in the 1977 survey,doubling修饰used动作,应该也可以吧