Read the following passage and mark the letter A, B, C or D to indicate the best answer to each of the following questions. Percy Lebaron Spencer (1894 -1970) was an American engineer and inventor. Like several great inventors, Dr. Percy Spencer made his most famous discovery by accident. He was testing a new piece of radar technology called “magnetron” in a laboratory in 1946 when the candy bar in his pocket started to cook. This interested him, so he put some corn next to the magnetron – and that cooked too! The next day Dr. Spencer and his colleague placed an egg near the magnetron. Dr. Spencer’s curious colleague took a step closer to check the egg – just in time for it to explode and cover his face. After a short time, the company Dr. Spencer worked for was trying to find a more controlled way to use this microwave energy to cook food. In 1947, the first microwave oven became available. It was almost two metres tall and weighed over 350 kilos. Finally in 1966, technology became advanced enough to produce microwaves for everyday cosmetics use. By then they were such smaller and easier to control. Nowadays, you can see microwave ovens all over the world. They are here to stay. 23. Which of the following is NOT true according to the passage? A. His colleague had a minor accident in the experiment. B. Dr. Percy Spencer was a radar expert. C. The first microwave was hardly convenient to use. D. Microwave ovens are now part of our life. 24. The word “by accident” in the first paragraph mostly means _______. A. on purpose B. by the way C. not controlled D. not planned 25. What could be the best tittle for the passage? A. The use of microwave ovens C. The story of Dr. Spencer. B. The history of microwave ovens. D. The inventions of Dr. Spencer. 26. Dr. Spencer discovered that _______. A. A new piece was called “magnetron”. C. Magnetron could cook food B. A candy bar could cook his pocket. D. Invention often happened by accident