1.Period 1—重点词汇、句型巩固;2.Period 2 Grammar—语法讲解used to的用法及反意疑问句;3.Period 3 Exercises—used to 用法练习                
                
                
                    第7讲 Unit 4 I used to be afraid of the dark.
                    
                    
                    
                            Period 1—重点词汇、句型巩固
                            (2015-03-15 17:54:00)
                        
                            Period 2 Grammar—语法讲解used to的用法及反意疑问句
                            (2015-03-15 18:12:00)
                        
                            Period 3 Exercises—used to 用法练习
                            (2015-03-15 18:30:00)