Sentence 1: I took my book bag from the desk and headed to school. 
 Sentence 3: When the teacher asked for the homework, I searched by book bag 
 Sentence 4:  I couldn't find it although I placed it there last night 
 Sentence 5:  Later that day, my mom told me that she moved it 
 Given Sentence 2: I walked inside my classes and sat down.