Fill in the blanks with the words and expressions given below. Change the forms where necessary. be worth it in the long run on the horizon renewable traditional expensive light up powerful replace type generation main provide ... with run out of under way globe million release special unlike I hope that people living in big cities can still see millions of bright stars ________________ the sky on summer nights. He wanted to sail around the __________________ when he was young. Wind is formed when the sun heats the air in some areas and air from cooler areas flows in to __________________ the heated air. Every four years, __________________ of people watch the World Cup on TV with great excitement. Do you know how to make use of __________________energy sources such as wind and wave power? Dr. Smith’s study __________________ us ____________ an answer to the question about the hot springs in this area. My family has lived in this house for __________________ and we don’t want to move to any other place. When oil __________________ into the sea, the sea water becomes polluted. As coal burns, it produces useful energy in the form of heat. The __________________ use of heat from coal is the production ( 生产 ) of electricity. Large cities always have lots of problems. When one is solved, there are often more __________________. There were so many different __________________ of bread that I didn’t know which to buy. He is very tall and needs a __________________ bed and shower at home. The cost of building or buying a racing car makes car racing one of the most __________________sports. My father spent 10 thousand dollars to build the green roof, but he thought it __________________. Maybe I am wasting my money having solar-energy systems installed, but I’m sure it’s the best thing for me to do __________________. It’s time for us to use solar energy or wind energy now because we are __________________traditional energy sources. __________________most other natural resources, such as coal and oil, forest resources are renewable. As cities become larger and larger, the people living around them find it more and more difficult to keep their __________________ way of life. This car runs faster than before because they have installed a more__________________engine in it. 20. Talks between the two companies about a new development plan have been __________________ for six months.