10 Questions Punctuation A fun ELA writing and grammar quiz about punctuation marks. Britannica, 08/27/2018 answers Play Which sentence correctly uses the Oxford comma? They were, red, blue and green. They were red blue and, green. They were red, blue, and green. They were red, blue and green. Which is the correct use of a semicolon? Canada is beautiful; so many impressive boats. I swear I saw a rabbit; bear; or mouse downstairs. Earth is old; it formed 4.5 billion years ago. I laughed; loudly. Which use of a colon is incorrect? I have to get surgery on my arm: I fell out of a tree. She had doctorates in two areas: philosophy and physics. I knew exactly what I wanted: pizza. She said :stop running!: This is a correct answer … and 7 more awesome questions! Check them out by clicking “Play”.