Unit 1 Sports and Games 1
Topic 1 Are you going to play basketball? 1
Topic 2 Could you please do me a favor? 15
Topic 3 What will Beijing be like in 2008? 27
Unit 2 Food and Health 36
Topic 1 You should go to see a doctor 36
Topic 2 I must ask him to give up smoking 48
Topic 3 What should we do to fight SARS? 58
Review of Units 1-2 67
Unit 3 Our Hobbies 73
Topic 1 I love collecting stamps 73
Topic 2 What sweet music! 84
Topic 3 What were you doing at this time yes-terday? 95
Unit 4 Our World 103
Topic 1 Plants and animals are important to us 103
Topic 2 I am sure there are no UFOs 119
Topic 3 The builders used live models,didn't they? 131
Review of Units 3-4 143
词汇表（按字母顺序排列） 145
附表单词 168
不规则动词表 171