Complete the gaps in the following text using the given verbs in grammatically appropriate tenses
Before it was over, the 20th century [ ] many radical changes. Almost every area of human activity [ ] innovations.The 20th century [ ] with steam-powered ships and ended with the space missions. By the turn of the century, automobiles already [ ] horses. Later, antibiotics [ ] millions of lives. For a couple of decades people [ ] their first small steps into space until they [ ] a leap on the Moon surface. Computer technology [ ] the whole difference. If a child is asking the parents to buy him or her something as a present, that [ ] a computer. Many people now [ ] a good chance of improving their health thanks to technological progress in medicine. I believe mankind [ ] even more by the end of the 21st century but the 20th century will hold its unique place in history forever.