Read the passage and answer the question: A successful text is the one where the reader is taken along by the flow of the writing, doesn't get lost or confused, and comes away with the feeling that ideas it contains could not have been expressed in any other way. So it is important to make a plan in which ideas are developed logically and necessary information is introduced at exactly the right point. Where it is necessary to use ideas or information that have not been referred to for some time, the reader needs a gentle reminder of what these are. If the flow of ideas needs to take a sudden new turn, this may need preparation or explanation. At every point, the reader's needs, expectations and possible difficulties must be considered. The introduction is often the most difficult section to write. That first sentence can often prove exasperatingly elusive. Novelists sometimes agonize for weeks over the first sentence of a new novel; it sets the tone of what is to come and fixes the reader's expectations. — "taken along" stands for: