九年级英语写作Unit 9 When was it invented.docx

Unit 9 When was it invented?【佳篇欣赏】 AWhat is the worst invention in the world?In 2002, an English made a survey about what the worst invention was in your opinion. The result was plastic bag. Plastic bags were invented by an Austrian scientist named Marx in the 1930s. Every year, people from the whole world use about five thousand million plastic bags. Because they are very cheap, many people just use them for one or two time and then throw away. If the cows or horses find them in the field and eat them, it will be dangerous for their health. Many animals died because of eating plastic bags. If they are burned, they will give out poisonous gas that is bad for people’s health and pollute the air. Some people bury them, and this is bad for the soil, because plants can hardly grow here. The only advantage of plastic bags is that they sometimes make life convenient. But they have too many disadvantages. So the name the worse invention suits them just fine. BMy new inventionI would like to introduce my new inventions. I have invented a car that uses water instead of petrol. It uses a new kind of engine that can turn water into energy. The new engine is a bit expensive, and the cars won’t be able to drive very fast. But it will be improved. It is a new way of producing energy, so we will have to build new cars. It can’t be used for normal cars.This invention is great for the environment. Imagine how nice and clean our cities would be if we didn’t havethe air pollution from cars.c Alfred Nobel Alfred Nobel was a great Swedish scientist and inventor. He had a big company that made and sold plosives and can even made weapons. Surprisingly, he was the man who set up the Peace Prize. Though he made a lot of money from selling weapon, he hated the war. He hoped that there would be no war in the world. When he died in 1876, he left behind him a lot of money. According to his will, most of his money was placed in his fund---the Nobel Prizes. He wanted the