alternative to powering engines using petrol.One day，when a strong cup of coffee wakes you up in the morning，you can use the coffee grounds to drive to work.

　　1．grounds n．　　　　　 渣滓

　　2．organic adj. 有机的

　　3．word pellets 木质颗粒燃料

　　4．generator n. 发动机

　　5．demonstrate vt. 说明；证实

　　1．What fuel is used to drive the engine of a car built by a U．S. team?

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　　2．How far can the car run with 20 kg of coffee grounds to power?

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　　【答案】　1.By wood pellets.　2.200 miles.

　　Section Ⅰ　Warm­up & Futurology－Preparing

　　根据提示写出下列单词

　　1．____________ n．　　　　　 质量；物质

　　2．____________ n. 放射；辐射

　　3．____________ n. 全体机组人员

　　4．____________ vt. 帮助；协助

5．____________ adj. 技术上的