摘要： Fast reading: Listen to the tape, and find out the answers to the questions. 1). What did Copernicus think was the center of the solar system? 2). When did Copernicus publish his theory? 3) Why didn’t Copernicus publish his theory before he died?2. Reading comprehension P7. 1.Use the reading to help you draw the two theories of the universe. Before Copernicus’ theory A diagram showing the solar system with the earth at its centre Showing Copernicus’ theory A diagram showing the solar system with the sun at its center Step 3. Persuasive writing

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