1) To protect our environment, we should use _________ fuels. 2) It is essential to rebuild the __________ of a modern market economy. 3) Developing a(n) _________ aircraft is quite an accomplishment in the history of aviation. 4) Children or rather, people of all ages, are often fascinated by ______ in books and movies. 5) She realized that to become a pop _______ she still has a lot to learn and she must train hard. 6) This is a(n) ________ modern dining table, combining tapered wooden legs with a glass top. 7) David was a(n) __________ manager and the company ceased to make progress when he was presiding over it. 8) The _____ rays can cause sunburn and even skin cancer; you should take necessary precautions before heading out into the scorching sun.