新概念英语第四册第23课:Bird flight
Lesson 23 Bird flight鸟的飞行方法First listen and then answer the following question.听录音，然后回答以下问题。What are the two ma
新概念英语第四册第24课:Beauty
Lesson 24 Beatuy美First listen and then answer the following question.听录音，然后回答以下问题。What do glimpses of beauty, either i
新概念英语第四册第22课:Knowledge and progress
Lesson 22 Knowledge and progress知识和进步First listen and then answer the following question.听录音，然后回答以下问题。In what two
新概念英语第四册第21课:William S.Hart and the early 'Western' film
Lesson 21 William S. Hart and the early Western film威廉.S. 哈特和早期限的‘西部’影片First listen and then answer
新概念英语第四册第19课:The stuff of dreams
Lesson 19 The stuff of dreams话说梦的本质First listen and then answer the following question.听录音，然后回答以下问题。What is goi
新概念英语第四册第20课:Snake poison
Lesson 20 Snake poison蛇毒First listen and then answer the following question.听录音，然后回答以下问题。What are the two different way
新概念英语第四册第16课:The modern city
Lesson 16 The modern city现代城市First listen and then answer the following question.听录音，然后回答以下问题。What is the authors m
新概念英语第四册第17课:A man-made disease
Lesson 17 A man-made disease人为的疾病First listen and then answer the following question.听录音，然后回答以下问题。What factor hel
新概念英语第四册第18课:Porpoises
Lesson 18 Porpoises海豚First listen and then answer the following question.听录音，然后回答以下问题。What would you say is the main ch
新概念英语第四册第14课:The Butterfly Effect
Lesson 14 The Butterfly Effect蝴蝶效应First listen and then answer the following question.听录音，然后回答以下问题。Why do small err