Listen and fill in the blanks with the words you hear. (答案可手写拍图上传) Flying has____1_____the world! It’s now possible to travel around the globe quickly and easily. Jumping on a plane and jetting off on holiday or a business trip is the norm for many of us, and with the rise of ____2_____ airlines, the number of people _____3______ is increasing. But while air travel is costing us less, the cost to the environment is ______4______ . Climate change is something we’re all aware of now, and aviation companies know that _________5___________ is being pointed at them. Last year commercial airlines were forecasted to use about 97bn gallons of jet fuel. But while we could think twice about _____6______ in the first place, particularly a short-haul (短程的) trip that could be made by train, technology might be the answer to reducing emissions and _____7_______ the environmental damage. Recent developments have focused on reducing the amount of fuel airliners burn. Making flying _______8________ was the hot topic at the recent Dubai Air Show. There was talk of advances in engine technology, making them more ____9______, and possibly using biofuel to power aircraft. Alejandro Rios Galvan, a bioenergy expert and professor at Khalifa University in Abu Dhabi, told the BBC that "these have the capacity to reduce the carbon footprint anywhere between 50-80% when you compare them to fossil (fuels)." And Phil Curnock, chief engineer of the civil future programme at Rolls-Royce, also suggested that electric hybrid engines could _____10_________ for smaller aircraft, covering shorter distances. He says " ___________11_____________ a carbon-neutral flight for a limited range." Being carbon neutral is______12___________for the aviation industry, and one British airline, Easyjet, has recently said it would become the world's first major net zero carbon airline by offsetting carbon emissions. Of course, aircraft _____13_______ are constantly looking at ways to make their planes more _____14________ . Boeing’s Dreamliner, for example, is already in operation and uses 25 per cent less fuel per passenger compared with aircraft of a similar size. Other improvements include better aircraft aerodynamics, changes to ways aircraft taxi on runways, and the use of lighter materials. But if we can’t kick the flying habit, it seems these are the developments we need to make in order to ensure air travel is as green as possible. But aviation experts agree it’s going to take time. ____________15______________ such as taxing flights, regulation or protest – or being grounded and not flying at all.