7-As the passage suggests, our solar system …….. .
A) is unique in the universe in terms of the celestial objects it includes
B) consists of much more than a star and a few planets
C) is in great danger because of the large number of meteorites
D) does not include a planet other than the Earth which harbours life
E) is not nearly as orderly as it was previously thought
8- According to the passage, before Copernicus, ………. .
A) many other scientists claimed the Earth and planets circled the Sun
B) nobody had ever really considered the nature of our solar system
C) much of what is known today about the universe was common knowledge
D) people used to believe that the Earth was in the middle of the universe
E) astronomy was simply the hobby of many uneducated amateurs
9- The belief held by many astronomers today is that our sun and its planets…….. .