Unit 9TEXT AAging in European countriesTEXT B C hildren ' s self-esteem 语法Unit 10TEXT AThe campaign for election TEXT B The American two-party systemcontentsUnit 1TEXT AW hat is a decision TEXT B S ecrets of success at an interview 语法AS 的使用方法Unit 2TEXT AB lack holes TEXT B Worlds within worldsUnit 3TEXT AEuthanasia : for and against TEXT B Advantage unfair语法Unit 4TEXT ASlavery on our doorstepTEXT B Return of the chain gangUnit 5TEXT AThe new musicTEXT B Different types of composers语法Unit 6TEXT AImproving industrial efficiency through roboticsTEXT B Predicting earthquakesUnit 7TEXT ALeisure and leadershipTEXT B The time message语法Unit 8TEXT AJet lag: prevention and cureTEXT B Controlling your concentrationUnit 11TEXT AS acrificed to science TEXT B L et ’ s stop keeping pets 语法Unit 12TEX