Need more information to complete the question. Which book is this?
What I know of that it Scrooge is visited as the bell tolls at one o'clock by the first of three ghosts, as promised by Marley's ghost: the Ghost of Christmas Past. The apparition is a curious figure' that both an old man and a child appear to be.
The answer is the third sentence: "Finally take care to put away all your supplies and clean your workstation, so you are ready for your shift in the morning." because the word 'so' is a conjuction.