第01集 Unit1 Topic1 Our country has developed rapidly SectionA

第02集 Unit1 Topic1 Our country has developed rapidly SectionB

第03集 Unit1 Topic1 Our country has developed rapidly SectionC

第04集 Unit1 Topic1 Our country has developed rapidly SectionD

第05集 Unit1 Topic2 The population in developing countries is growing SectionA

第06集 Unit1 Topic2 The population in developing countries is growing SectionB

第07集 Unit1 Topic2 The population in developing countries is growing SectionC

第08集 Unit1 Topic2 The population in developing countries is growing SectionD

第09集 Unit1 Topic3 The world has changed for the better SectionA

第10集 Unit1 Topic3 The world has changed for the better SectionB

第11集 Unit1 Topic3 The world has changed for the better SectionC

第12集 Unit1 Topic3 The world has changed for the better SectionD

第13集 Unit2 Topic1 Pollution has caused too many problems SectionA

第14集 Unit2 Topic1 Pollution has caused too many problems SectionB

第15集 Unit2 Topic1 Pollution has caused too many problems SectionC

第16集 Unit2 Topic1 Pollution has caused too many problems SectionD

第17集 Unit2 Topic2 All these problems are very serious SectionA

第18集 Unit2 Topic2 All these problems are very serious SectionB

第19集 Unit2 Topic2 All these problems are very serious SectionC

第20集 Unit2 Topic2 All these problems are very serious SectionD

第21集 Unit2 Topic3 What can we do at home to protect the environment-SectionA

第22集 Unit2 Topic3 What can we do at home to protect the environment-SectionB

第23集 Unit2 Topic3 What can we do at home to protect the environment-SectionC

第24集 Unit2 Topic3 What can we do at home to protect the environment-SectionD

第25集 Unit3 Topic1 English is widely spoken throughout the world SectionA

第26集 Unit3 Topic1 English is widely spoken throughout the world SectionB

第27集 Unit3 Topic1 English is widely spoken throughout the world SectionC

第28集 Unit3 Topic1 English is widely spoken throughout the world SectionD

第29集 Unit3 Topic2 Some things usually have different meanings SectionA

第30集 Unit3 Topic2 Some things usually have different meanings SectionB

第31集 Unit3 Topic2 Some things usually have different meanings SectionC

第32集 Unit3 Topic2 Some things usually have different meanings SectionD

第33集 Unit3 Topic3 Could you give us some advice on how to learn SectionA

第34集 Unit3 Topic3 Could you give us some advice on how to learn SectionB

第35集 Unit3 Topic3 Could you give us some advice on how to learn SectionC

第36集 Unit3 Topic3 Could you give us some advice on how to learn SectionD

第37集 Unit4 Topic1 When was it invented？SectionA

第38集 Unit4 Topic1 When was it invented？SectionB

第39集 Unit4 Topic1 When was it invented？SectionC

第40集 Unit4 Topic1 When was it invented？SectionD

第41集 Unit4 Topic2 I'm excited about the things that will be discoveredSectionA

第42集 Unit4 Topic2 I'm excited about the things that will be discoveredSectionB

第43集 Unit4 Topic2 I'm excited about the things that will be discoveredSectionC

第44集 Unit4 Topic2 I'm excited about the things that will be discoveredSectionD

第45集 Unit4 Topic3 China is the third nation that sent a person into SectionA

第46集 Unit4 Topic3 China is the third nation that sent a person into SectionB

第47集 Unit4 Topic3 China is the third nation that sent a person into SectionC

第48集 Unit4 Topic3 China is the third nation that sent a person into SectionD