九年級(jí)英語(yǔ)全冊(cè) unit 13 we’re trying to save the earth section a（1a-2d）課件 新人教版 (2)-文庫(kù)吧
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【正文】 _ for fishermen to catch. 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. Listen to 2b and plete the sentence. 1.
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