Missing book

It seems that I’m back in my highschool class sitting next to harianto learning one of the subject taught by Mr. Murat. I didn’t photocopy book 6 & book 7 like he told me to. Instead I only copy 6. So that day we are near the end of book 6, suddenly everyone stand up & start singing something from book 7. Mr. Murat is standing next to us while we are busy flipping pages. When I realise we don’t have it, I told him that we don’t have book 7. He then whisper to me that whenever he asked us to copy something, we better copy them all and not only half of it. In the end we couldn’t sing because the song is so blur that it can’t be read.