Story needs to be completed:
Leslie hesitated before asking Kenneth, again, about the difference between poisonous and venemous;

My choice:
Leslie always forgot.

Story needs to be completed:
Felicia's accounting class was going well, but Mary's was not because

My choice:
Mary had an arrogant professor.

Story needs to be completed:
Singh drank a soda with caffeine to combat his tiredness but it didn't work because the

My choice:
caffeine was too weak.

Story needs to be completed:
Derrick graduated from nursing school with better grades than Benjamin because

My choice:
Benjamin skipped class regularly.