Unit 4 I used to be afraid of the dark. Section B 1a-1e一、Teaching Aims:1. to learn and to use these words: ant insect general introduction 2. to be able to use used to do sth. eg. I used to be nervous about the tests.二、Teaching key points: 1. Sentences:(1) Where did you use to live?(2) I used to be nervous about the tests.2. new words and phrases: ant insect general introduction 三、Teac