题目内容：

背诵课文填空

It is not surprising that people wanted to believe these ancient views as they had 1. 2. 3. by the great philosopher Aristotle. He said that the Earth must be the center of the universe because it felt like the Earth was  4. 5.. Galilei disagreed. At first, people approved of his studies and 6. 7. 8. 9., but later when he proved Aristotle wrong, they grew angry and  10. 11. 12. 13.. They didn't want to challenge what they'd always thought was true.