How many people are there on Earth? Over 7,000,000,000.
How many countries are there on Earth? .
How many languages are there in the world? Over .
How many typical people are there on Earth? Over .
How many Chinese speakers are there on Earth? More than .

全新版大学进阶英语：视听说教程第一册

章节列表

Unit 1 Identity27 Unit 2 Sports25 The Big Picture 11 Review 14 Unit 3 The Night29 Unit 4 Fashion28 The Big Picture 22 Review 22 Unit 5 Homes28 Unit 6 Buying & Selling29 The Big Picture 33 Review 33 Unit 7 Weather29 Unit 8 Mysteries32 The Big Picture 42 Review 42 Practice Test One25 Practice Test Two25