I do RFTG, and for creative my teacher has advised us to pre-prepare our own "local" and simply adapt it to the question, whether it ask for a feature article, story, or whatnot. You research the local, finding enough elements for a narrative or feature article, and make it broad enough to adapt to any sort of question.
As a crude example, you could choose the scenario of a small rural town in America protesting the establishment of a supermarket. You decide on the names of certain characters and their stances (in a narrative they'd have dialogue, in a feature article they'd be interviewed, and in a discussion transcript they might send in letters that the interviewees are asked to comment on), the nature of the struggle, and the eventual outcome.
It's got the safety of a pre-prepared answer, but enough dynamism to make it seem spontaneous.