词汇讲解：
1. gangster n. 匪徒, 歹徒
例句：One of the gangsters was caught by the police.
歹徒之一被警察逮捕。
2. theft n.偷盗, 偷窃；盗窃之物；失窃案例
例句：He was arrested for theft.
他因盗窃而被送进了监狱。
3. scrap n. 切削;废料,废金属; 垃圾,破烂
例句：All he could do was sell it for scrap.
他只得把它当废物出售。
4. skyrocket vi. 突升, 猛涨
例句：The price of sugar has suddenly skyrocketed up.
糖价突然飞涨。
5. thief n. 小偷, 盗贼,�
