Student or Learner
Without any context, are all four choices possible in the following test question?
Our friendship ______ quickly over the weeks that followed.
A. had developed B. was developing
C. would develop D. developed
But I think D. would be the expected answer. The correct answer is the BEST answer, which means the most obvious; the one that needs the least explaining; the one for which a context is not at all dubious; the most commonly used one; the one that a student at that level should know; perhaps the first one the student would learn ...