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so…as… 只能用于 否定句。 ? put those ideas into a map so that you can easily see them。 Writing and Summary ? share ideas with others。 ? use the map to help you as you write. Brainstorm Why should I learn English? to use for business. to use in school. to write to pen friends. to talk to native speakers. to read English books. to listen to English music and movies. pollution the present situations (water, air, noise, light) the serious result the method to stop pollution the cause of pollution Write a position after