Ann is a student in a middle school. She takes the school bus to school every day. She likes putting her things here and there.

    She often sits near the bus driver. Today is Wednesday. Ann gets off(下车)the bus. She comes into the classroom. Now it's time to have the English class. But Ann can't find(找到))her schoolbag. Her English book is in it. She looks into her desk, and it is not there. "Oh, no!" Ann thinks. "Is it at home? Where is it?"

    Just then, the English teacher, Mr. Black,callsAnn's name. He gives her an English book. And in the book, Ann sees a note（便条）：