1.1Science and Scientists Reading and Thinking
1.2Science and Scientists Learning About Language (1) Vocabulary
1.3Science and Scientists Discover Useful Structures
1.4Science and Scientists Using Language（第1课时）
1.4Science and Scientists Using Language（第2课时）
1.4Science and Scientists Listening and Speaking(Workbook)
1.5Using Language(2). Reading and Writing
1.6Assessing Your Progress
1.8Science and Scientists Video Time
2.1Bridging Cultures Reading and Thinking
2.3Bridging Cultures Discover Useful Structures
2.3Bridging Cultures Using Language（第1课时）
2.3Bridging Cultures Using Language（第2课时）
2.4Bridging Cultures Listening and Speaking(Workbook)
2.5Using Language(2). Reading and Writing
2.8Bridging Cultures Video Time
3.1Food and Culture Reading and Thinking
3.3Food and Culture Discover Useful Structures
3.4Food and Culture Listening and Speaking(Workbook)
3.4Food and Culture Using Language（第1课时）
3.4Food and Culture Using Language（第2课时）
3.5Using Language(2) Reading and Writing
3.8Food and Culture Video Time
4.1Journey across a Vast Land Reading and Thinking
4.3Journey across a Vast Land Discover Useful Structures
4.4.Using Language(1). Listening and speaking
4.4Journey across a Vast Land Listening and Speaking(Workbook)
4.4Journey across a Vast Land Using Language（第1课时）
4.4Journey across a Vast Land Using Language（第2课时）
4.5Using Language(2). Reading and Writing第1学时
4.6.Assessing Your Progress
4.8Journey across a Vast Land Video Time
5.1First Aid Reading and Thinking
5.3First Aid Discover Useful Structures
5.4First Aid Listening and Speaking(Workbook)
5.4First Aid Using Language（第1课时）
5.4First Aid Using Language（第2课时）
5.5.Using Language(2). Reading and Writing
