Unit 1 1
Love,Marriage＆Responsibility 1
Unit 2 30
Environment Protection＆Sustainable Development 30
Unit 3 74
Abilities,Jobs＆Promotions 74
Unit 4 115
AIDS and Its Effect on Human Beings 115
Unit 5 153
Younger Generation-A Threat to the Values of the Older Generation 153
Unit 6 183
Mercy Killings 183
Unit 7 214
Wealth,Health＆Happiness 214