Unit 2 I used to be afraid of the dark.知识要点&相关习题重点短语和核心知识点：1. used to do 过去常常 2. be used to doing 习惯于作3. be used to do 被用来作4. pay ( more )attention to sth. ( doing sth.)对（更加）注意5. give up doing = stop doing放弃做6. instead of ( doing ) 代替, 而不是7. lose interest in 对失去兴趣8. be afraid ( terrified ) of doing sth. 惧怕做9. be terrified of sth. / sb.=be afraid of惧怕某人/ 物10. go to sleep = fall asleep 入睡 11. all the time = alway
