【正文】
____________ ____________ loud music planes mobile phonesfactories cars smoking ships factories littering rubbish building houses building houses loud music cars rubbish planes littering ships factories smoking building houses mobile phones 1b Listen and plete the sentences. What was the problem? The river was _____________. Even the bottom (底部 ) of the river was full of _________. There were no more ______ for fishermen (漁民 ) to catch. really dirty rubbish fish What caused the problem? People are throwing _______ into the river. Factories are putting ______ into the river. How should the problem be solved? We should write to the ____________ and ask them to ___________ the factories. Everyone should help to __________ the river. litter waste government close down clean up Listen again and check (√) the sentences you hear. 1. We could go fishing in the river. 2. The river was really dirty. 3. The river has always been the nicest river in this town. 4. We should ask the teachers for help. √ √ 1c The river was dirty. Even the bottom of the river was full of rubbish. But it used to be so clean! Yes, but people are throwing litter into the river. Everyone in this town should play a part in cleaning it up! Make conversations using the pollution in 1a. The river has always been the nicest river in this town. Yes, it used to be so clean. What caused the problem? But I was there last weekend and the river was really dirty. Factories are also putting waste into the river. People are throwing litter into the river. What should we do?