实用的飞机Airplanes are useful4 in many ways. First, it is the fastest transportation (交通). It can save (节省) time. Second, if there was a big fire in the forest, only airplanes could get there quickly ……

When asked about the color of airplanes, people will usually say they are white. Yes, airplanes... weather conditions.Besides, colorful airplanes often lose their designs after years of being damaged ……

, heavy trucks and airplanes C. cars, light trucks and heavy trucksD. light trucks, heavy trucks and airplanes 2. How much energy do Americans use in transportation and the household altogether? A. More ……

, heavy trucks and airplanes C. cars, light trucks and heavy trucksD. light trucks, heavy trucks and airplanes 2. How much energy do Americans use in transportation and the household altogether? A. More ……

Bad meals in the sky飞机餐为什么不好吃？Why isn’t airplane food very tasty? It’s because our senses of smell and taste become less sensitive (敏感的) in airplanes. Airplanes are full of dry air. This air can make ……

airplanes into the World Trade Center and the Pentagon, killing nearly 3,000 people.  AFPRemembering... of the attacks. In 2001, the terrorist group al-Qaeda flew hijacked airplanes into the World Trade ……

airplanes (超音速飞机) came out in the 1960s. But they were too noisy to use. Now, US company Boom will make better airplanes of this kind. They fly higher than usual airplanes. This makes the flight (飞行 ……

future transportation (交通).  Supersonic airplanesSupersonic airplanesSupersonic airplanes... airplanes of this kind. They fly higher than usual airplanes. This makes the flight more stable (稳定 ……

of a new engine system. The designers expect it to set a new speed record for airplanes. ……

Jumbo jet 大飞机CHINA'S first company to build jumbo jets was set up in Shanghai this month. It's a key step forward in China's ambitious (雄心勃勃的) project to produce homemade large passenger airplanes ……

大飞机CHINA'S first jumbo jet company was set up in Shanghai this month. It's a key step forward in the country's ambitious (雄心勃勃的) project to produce large homemade passenger airplanes.A jumbo jet ……

参加航模大赛，放飞远大梦想！LOOK! Some teenagers in the photo are flying their model airplanes (航模). They are students from primary schools and middle schools in Nanning, Guangxi. They made the models themselves ……

热气球的盛会。HOW did people fly before there were airplanes (飞机)? Hot air balloons (热气球)! The big balloon flies with the power (力量) of fire and takes people through the sky. On Sept 19, the International ……

D1 1. Silly 2. mysteries 3. illnesses/diseases 4. rats 5. collecting 6. airplanes 7. seconds 8. Aim/Purpose 9. contribution 10. funD2 1-3 BDB D3 1-4 BAAC D4 1-3 DDBD5 1. to get 2. came 3. But/Yet 4 ……

D1 1-3 DDB D2 1-4 BCBD D3 1-4 DDBA D4 1-4 BDABD5 1. interesting→interested 2. airplane→airplanes 3. where→when 4. 去掉wrote后的it 5. world’s前∧the 6. passing→passed 7. Late→Later 8. had→has 9. of→for 10. but→and ……