Obiectives a) Understand the main idea and structure of the text b) Learn some techniques in expository writing (definition, quotes, a mixture of facts and opinions, etc. c) Grasp the key language points and grammatical structures in the textObjectives a) Understand the main idea and structure of the text; b) Learn some techniques in expository writing (definition, quotes, a mixture of facts and opinions, etc.); c) Grasp the key language points and grammatical structures in the text