Unit21《Human Biology》(Lesson 1)ppt-北师大版高二下
Unit21《Human Biology》(Lesson 1)ppt-北师大版高二下第5页

 Read the text quickly and divide it into four parts , then summarize the main topic of each part. Part 1(paragrah --- ) Part 2(paragraph --- ) Part3(paragraph --- ) Part4(paragraph --- )

Introduction

Benefits of chewing gum

The negative side of chewing gum

Better activities than chewing gum