Period 2　ReadingThe General Idea of This PeriodThis is the second period of this unit.This period focuses on the reading passage which is about John Snow and King Cholera.At the beginning of the perio

PAGE PAGE 9Periods 1　Warming up and ReadingThe General Idea of This PeriodThis period includes Warming upPre-readingReading andprehending of Unit 2.It introduces something about agricultur