The student put in a ________ of effort and consequently got a low score on the exam.
(a) concurrence
(b) modicum
(c) multiplicity
(d) plethora
(e) redundancy
If the student got a low score as a result of his effort, we can safely assume that his effort was not very substantial. We’re looking for a word that has to do with a small amount. The only word that works here is “modicum.” Look up all these words and you’ll see how much easier sentence completions are when you have a strong vocabulary. The answer is (B).
source: collegeapps.about.com