九年級英語全冊 unit 13 we’re trying to save the earth section a（1a-2d）課件 新人教版 (2)-全文預覽
【正文】 the conversation(2d). ? Discuss how to stop the pollutions. Work alone ? 1 Sometimes people use chemicals much on their fields, so ____ is difficult to stop. ? 2 Each year people pour waste into rivers, lakes and so on, so ___ is everywhere in China. ? 3 ___ makes people sick. It causes breathing problems and even cancer. ? 4 In
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