Unit 4 I used to be afraid of the dark.实践过程：本节课我主要的线索是：“Guessing Time -Talking Time-Listening Time-Speaking Time-Writing Time”（1）Guessing Time:T: As time goes on,we are changing every day. For example ,we are growing taller and our hair longer and longer day by day. Our appearances, personalities, etc. Change with the growing years. Now lets play a guessing game -WHO IS IT?(课前让学生准备自己三、四年前的照片，学生感知自己及他人在外貌或者性格方面的变化。)实物投影仪展示本班同学的照片，让学生猜“这是谁？”，并能
