Unit15 Healthy eating 1
Unit16 Fire 11
Unit17 Nature 22
Unit18 The necklace 32
Unit19 Jobs 41
Unit20 Mainly revision 51
期中综合检测试题 61
Unit21 Karl Marx 67
Unit22 Britain and Ireland 77
Unit23 Rescuing the temple 86
Unit24 The science of farming 95
Unit25 At the conference 104
Unit26 Mainly revision 113
期末综合检测试题 122
附录1：能力训练与综合检测试题参考答案 128
附录2：听力录音材料 135