What's that mean: 'i walk slowly but i never walk backward'.?

Is the slightly humorous tone of kristof's essay inappropriate for a discussion of deliberately killing wild animals? why or why not?

Which line from “a simple way to create suspense” best supports the central idea that writers should not give their readers answers too quickly? a. the reader learns to chase, and the momentum becomes unstoppable. b. so writers are taught to focus on ingredients and their combination. c. we had to invent a solution to the serious problem it posed. d. thus the principle works in a micro sense, as well as in a macro one.

Used for an event that has been completed before the present moment in time. simple past past perfect perfect progressive past perfect progressive