Pre-listening activities（听前活动）While-listening activities （听中活动）Post-listening activities （听后活动）Let the students look at the form and ask what kind of pollution it may be. They should try to predict what problem it was, what caused the problem and how to solve the problem.Students should listen to the conversation and complete the sentences in 1b. Students can listen to the tape three times and complete three questions.Students may read the conversation and then role play the conversation. They may be divided into pairs to act out the conversation.Grade Nine Unit 13 We’re trying to save the earth! Section A
