Unit 2 Saving the Earth Topic 1 Pollution has caused too many problems .Section DIt _____ (be) beautiful in the past. Kangkang _______ (go) there two years ago.The flowers and grass ___________ (go).Everything _____________ (change).Mrs. Zhou ____________ (be) like this since last week. She ______________ (not see) a doctor yet.waswenthave gonehas changedhas beenhasn’t seenSimple past 强调过去 Present perfect 强调现在They are caused by pollution.There are many kinds of pollution around us, air pollutionlight pollutionlitterwater pollutionsoil pollutionnoise pollutionRead through Sections A-C and fill in the blanks with the correct words.GrammarI _____ (go) there two years ago.There ______ (be) lots of flowers and grass.What _________________ (happen) here?I have ______ (be) like this since last week.The flowers and grass ____________ (go)!beenwerehas happenedhave gonewentSimple Past ＆ Present PerfectOh, what a _______!There are several chemical factories _______ waste water into the stream.What’s ______, the factory makes too much noise…Noise is _________ to human’s health.People who work and live in noisy conditions often ______ deaf.…many teenagers in America can hear no ______ than 65-year-old people do, ……does great _______ to people’s hearing.Functionsshamepouringworsegoharmfulbetterharm( ) 1. What is the passage mainly about? A. Air pollution. B. Light pollution. C. Litter. D. All sorts of pollution.( ) 2. ________ destroy(s) the soil. A. Chemicals B. Weather C. Noise D. Industry( ) 3. How do people feel after they work in strong light for a long time? A. Excited. B. Happy. C. Terrible. D. Sad.How well do you know Sections A-C? Now do the following tasks and check.ADCPollutionCauseEffectair pollutionburnin...
