Read the following passage and choose A, B, C or D to fill in each blank.     

      Thomas Edison was one of the (3) ______ inventors of the world. He was responsible for more than one thousand (4) _____ including the electric light bulb and the record player. He also created the world’s first industrial research laboratory. Edison was born in 1847 in Ohio, USA. When he was 10 years old, he set up a small laboratory after he (5) _____ a science book his mother showed him. In 1869, he borrowed some money and began to make inventions. In 1876 he built a new laboratory so that he could spend all his time inventing. He planned to turn out minor inventions every ten days and “big trick” every six months. He developed many devices that brought great (6) _____ to people’s life. He once said that the value of an idea lay in the using of it. Edison died in 1931, after having a remarkably productive life.

          Thomas Edison was one of the (3) ______ inventors of the world.