'Plactic bags' presentation slideshows

Would you like to be a greener person?

Review Unit 2 Topic 3. Would you like to be a greener person?. Review the words:. power. ??. ought to. ?? , ?? , ?. ???. plastic. ??. ?? , ?? , ??. battery. ??. action. suppose. turn off. ??. ??. turn off. ??. acid rain. ?? , ??. journey. ??. encourage. ( ? ) ?? , ??.

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