Join pairs of sentences with a relative pronoun, so that the meaning stays the same. 1) Leonardo Da Vinci drew sketches and diagrams of his inventions. He also was a great painter. 2) Hamilton Smith patented the rotary washing machine. He also won the Noble Prize. 3) The World Wide Web has become an essential part of our lives. It was invented by Tim Berners-Lee. 4) Thomas Edison was born in Milan, Ohio. He invented the light bulb. 5) Giovanni de la Fontana constructed a human-powered device consisting of four wheels. He was an Italian engineer. 6) The scientist Isaac Newton was born in a little town called Grantham. Margaret Thatcher was also born there. 7) The telephone is an essential thing now. It was invented in 1876. 8) Isaac Newton discovered the Law of Gravitation. He was sitting under a tree at the time.