Nylon .....(33)..... in the early 1930s by an American chemist, Julian Hill. Other scientists .....(34)..... with his invention, and finally on 27 October, 1938 nylon .....(35)..... to the world. It was cheap and strong and immediately .....(36)..... successful, especially in the making of women's stockings. During the Second World War, the best present for many women was a pair of nylon stockings, but more importantly, nylon .....(37)..... to make parachutes and tires. Today, nylon .....(38)..... in many things: carpets, ropes, seat belts, furniture, computers, and even spare parts for the human body. It .....(39)..... an important part in our lives for over 50 years. Next year about 36 million tons of it .....(40)..... .

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