This brief quiz assesses student understanding of Usage Rule 9, regarding subject-verb agreement, from Strunk and White's The Elements of Style. This download includes the quiz and key. Save considerably by purchasing the complete 11-rule quiz set, which correlates with Strunk and White's primary rules in the classic writing text. Also check out my other materials for grammar and mechanics, literary units, and writing instruction. Please let me know if I can be of any assistance either before or after purchasing a product; I'll be happy to help where I can.