阅读下面的短文,用方框中所给单词的适当形式填空，使文意通顺，结构正确。（每个单词限用一次）

    Have you ever dreamed of flying to school like Harry Potter? Of course, you're not a magician. But Speeder could make your dreams true. Speeder is a flying motorcycle. A US company made . The company calls it the world's flying motorcycle.

    Speeder can take off land anywhere. It flies at 240 km per hour at a height of 4, 500 in the sky. To reach that speed, Speeder mainly uses diesel fuel (柴油) to . The company will do more research on to use clean energy to power Speeder in the future. Speeder riders must weigh than 109 kg. If a rider is too heavy, it will be hard the motorcycle to take off.