3. Post-reading task: Identifying author's purpose and perspective.• There are four general purposes for an author to write something: to 1)_________, to 2)_________, to 3)_________ , and to 4)___________ .• The author’s perspective includes the 5）_________of the text and the 6）_______used to present the idea. It reveals the author's beliefs, personal judgments or attitudes toward a certain subject.