answer: #Person2# tells #Person1# why #Person2# changed the job so frequently.
documents: #Person1#: Why have you changed your job so frequently?
  #Person2#: My first job was in a well-established company where the division of labour was very clear. I do not have more chances to enrich my experience. Then I got an opportunity to really broaden my experience with a new company that was starting up, but unfortunately, they closed their service in three months'time. I have worked in my present company for a considerable length of time and enjoy the job I am doing now, but I think I have accumulated enough experience to take up more challenging post in a much larger and diversified company where I could make solid contribution.