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3. 登錄 “優(yōu)教同步學(xué)習(xí)網(wǎng)”, 預(yù)習(xí) Lesson17。 Practice Nod your head. Open your mouth. Close your eyes. Touch your neck. Clap your hands. Wave your arm. Practice Nod your head. Open your mouth. Close your eyes. Touch your neck. Clap your hands. Wave your arm. arm Summary