语音讲解：
　　　(点击右键“另存为”可下载语音)

　　I could still remember the time we cleaned the windows after class in my middle school. At that time, I was quite active and did it with my shoulder to collar. Whereas now, I am usually referred to as a lazy bone by my mother. I felt shame.

　　clean the window 擦窗户

　　to work with my shoulder to collar 辛勤工作

　　be referred to 被提到

　　lazy bone 懒骨头