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Pre-listening activities（听前活动）While-listening activities （听中活动）Post-listening activities （听后活动）Give students some pictures about pollution and ask them to talk about what caused the problem and how to solve it. The students can try to predict what the conversation is about.Students listen to the conversation, write down the missing words and complete the sentences.Students can role play the conversation. Then they may make their own conversations about other kinds of pollution.
