求翻译：　　（1）教师呈现本课时教材图片，向学生提出问题说：“It's time to go to bed. Mike puts away his textbooks．But he puts wrong books in his schoolbag．Why？”让学生带着问题快速读对话，然后请学生尝试解答这一问题，能用汉语表达出来原因即可。是什么意思？