Unit 13 Healthy eating 1
Unit 14 Festivals 26
Unit 15 The necklace 51
Unit 16 Scientists at work 78
Unit 17 Great women 99
Unit 18 New Zealand 133
Unit 19 Modern agriculture 151
Unit 20 Humour 174
Unit 21 Body language 195
Unit 22 A world of fun 215
参考答案 237