Contents

Lesson 1．Important Words

Lesson 2．Is Our World Getting Smaller?

Lesson 3．No Boots on

Lesson 4．The Law Is the Law but

Lesson 5．Lightning

Lesson 6．Do You Want a Good Memory?

Lesson 7．What Happens When You Sleep?

Lesson 8．The Golden Gate Bridge

Lesson 9．Underwater City

Lesson 10．The Search for New Evidence

Lesson 11．Master Craftman

Lesson 12．Ships—Important Means of Transport

Lesson 13．Living Together（1）

Lesson 14．Living Together（2）

Lesson 15．How Well Do You See?（1）

Lesson 16．How Well Do You See?（2）

Lesson 17．The Doctor s Story

Lesson 18．The Time to Learn（1）

Lesson 19．The Time to Learn（2）

Lesson 20．Age of New Materials

Lesson 21．Painting Aunt Polly s Fence

Lesson 22．The Marvels of Colour

Lesson 23．How Do Animals Know When an Earthquake IsComing?

Lesson 24．Rare Visitors

Lesson 25．Self-Protection

Lesson 26．Trial and Sentence

Lesson 27．Nature Note

Lesson 28．Once in a Lifetime

Lesson 29．One Man s Garden

Lesson 30．Heat Pollution and Noise Pollution

Appendix Ⅰ Phrases and Expressions

Appendix Ⅱ Proper Names

Appendix Ⅲ Vocabulary