1、Unit21 Lesson3 学习目标 By the end of the class, the students will be able to: identify the structure of one type of discursive essays. use the strategies of sequencing to put the text back together. voice your feelings about epidemics. 学习过程 课前准备 课 堂活动 （一） 预习交流 Check the answers. （二） 合 作探究 Name of the e
2、pidemics Time Place Causes & Effects Bird Flu 1997 worldwide, take 100 lives 500-550AD North Africa, the Middle East, Europe Black Death Started in Asia, Europe, Africa, the Middle East 1918 Similar as the Black Death SARS China , Canada, Vietnam, Singapore Hong Kong,- （三） 分层提高 Exercise 4 Page 39 1.trial 2.prohibit 3.pause 4.tendency 5.acute 6.statistics 7.routine 8.press 9.tablet 10.thorough a) complete b) data c) delay d) habit e) media f) pill g) prevent h) severe i)test k) trend （四） 总结归纳 （五） 巩固反馈 Finish the exercise.
