2025-2026学年北师大版（2019）必修第二册 Unit 4 Information technology Lesson 1 Avatars 　Lesson 1 Step 1　速读——整体理解文意 Ⅰ.明文章大意 What is the main idea of the passage? A．The history of virtual avatars. B．People’s views on virtual avatars. C．Overall information a...