4.You are going to hear four brief news items.Focus your attention on who”,what”,when,“where”,why"and "how”in each news iten and then answer the questions 1)What have researchers found according to the report? 2)How many people suffer from food allergies in the United States? 3)How serious can food allergies be? 4)What may be nature's deadliest killer according to experts? 5)Why do heat waves often become dangerous? 6)What do most Americans need according to medical experts? 7)What is the possible relationship between enough sleep and heart disease? 5.Get the students to know the following words: 10min Spread of viruses,public restrooms,infectious diseases,the correct method,organism,cholera,hepatitis,infection Before you listen to the material,discuss the following questions 1)Do you think hand washing is a serious issue?Why or why not? 2)How do you wash your hands? 7.Now listen to the report.Focus on the major points.Supply the missing information.(P117) 4. You are going to hear four brief news items. Focus your attention on “who”, “what”, “when”, “where”, “why” and “how” in each news item and then answer the questions. 1) What have researchers found according to the report? 2) How many people suffer from food allergies in the United States? 3) How serious can food allergies be? 4) What may be nature’s deadliest killer according to experts? 5) Why do heat waves often become dangerous? 6) What do most Americans need according to medical experts? 7) What is the possible relationship between enough sleep and heart disease? 5. Get the students to know the following words: Spread of viruses, public restrooms, infectious diseases, the correct method, organism, cholera, hepatitis, infection 6. Before you listen to the material, discuss the following questions: 1) Do you think hand washing is a serious issue？Why or why not? 2) How do you wash your hands? 7. Now listen to the report. Focus on the major points. Supply the missing information. (P117) 15 min 10 min 10 min 10 min