Read the following passage about The Journey of Resilience and mark the letter A, B, C or D on your answer sheet to indicate the option that best fit each of the numbered blanks from 18 to 22.

Galileo Galilei, one of the first modern scientists, ___(1)___. About twenty years later, he attended the University of Pisa. At first, he studied philosophy, but later he studied mathematics and
astronomy. He was interested in the way the earth and other planets move around the sun, ___(2)___. He also started a new way of working in science. Before Galileo, scientists did not do experiments. They just guessed about how something happened.
Galileo was different. He did not just make guesses. ___(3)___. Galileo was famous for his study of how things fall. He was the first person to do experiments about this problem. Before that, people thought that heavy things always fell faster than light things. He found out that this was not true. He took a heavy ball and a light ball, and he dropped them both from a high place. They fell at the same speed.
This meant that weight is not important. This is the law of failing bodies. ___(4)___. The life of the scientist was not always easy in the 1500s. For example, having incredible scientific ideas, ___(5)___. His ideas were not the same as the religious ideas at the time. Many religious people did not agree with him. During his whole life, he had to worry about this. He even went to prison for a while.