IX. Fill in each blank with the most appropriate word from the four choices given. Traditional western ways of thinking can often lead to an 1 when we are confronting a truly difficult problem. This happened to Dr. Edward Jenner when he was trying to 2 up with a vaccine for the deadly disease known as smallpox. Jenner was 3 to solve the problem he faced by changing the 4 within which he looked at it. Rather than focusing on people who had smallpox, he 5 carefully at those who seemed never to get the disease. This change in 6 is an example of what is known as “lateral thinking.” The term means choosing not to approach a problem head-on, but instead looking at it 7 . In lateral thinking, being able to take in and 8 all kinds of ideas, no matter how unlikely they might seem, is of the 9 significance. Lateral thinking can help all kinds of people, from smokers who want to give 10 their habit, to archers who need to relax in order to perform 11 their best. This idea does not 12 that solutions which come from vertical thinking are always deeply 13 . The truth is that different ways of thinking have different 14 when you get stuck struggling with a problem head-on, thinking laterally can help you to shift your point of view and perhaps see a 15 you wouldn’t otherwise notice.