Lesson 67 Volcanoes 火山 Lesson 68 Persistent 纠缠不休 Lesson 69 But not murder! 并非谋杀！ Lesson 70 Red for danger 危险的红色 Lesson 71 A famous clock 一个著名的大钟 Lesson 72 A car called bluebird “蓝鸟”汽车 Lesson 73 The record-holder 纪录保持着 Lesson 74 Out of the limelight 舞台之外 Lesson 75 SOS 呼救信号 Lesson 76 April Fools' Day 愚人节 Lesson 77 A successful operation 一例成功的手术 Lesson 78 The last one? 最后一枝吗？ Lesson 79 By air 乘飞机 Lesson 80 The Crystal Palace 水晶宫 Lesson 81 Escape 脱逃 Lesson 82 Monster or fish? 是妖还是鱼？ Lesson 83 After the elections 大选之后 Lesson 84 On strike 罢工 Lesson 85 Never too old to learn 活到老学到老 Lesson 86 Out of control 失控 Lesson 87 A perfect alibi 极好的不在犯罪现场的证据 Lesson 88 Trapped in a mine 困在矿井里 Lesson 89 A slip of the tongue 口误 Lesson 90 What's for supper? 晚餐吃什么？ Lesson 91 Three men in a basket 三人同篮 Lesson 92 Asking for trouble 自找麻烦 Lesson 93 A noble gift 崇高的礼物 Lesson 94 Future champions 未来的冠军 Lesson 95 A fantasy 纯属虚构 Lesson 96 The dead return 亡灵返乡