Glad to meet you again.
I would like to take you to Carol Fisher Saller’s copyediting quiz. That is a small list of nine sentences. Try them out and see for yourself your copyediting skills.
In her next post, First Do No Harm, she discussed the answers, too. But wait. Don’t check out the answers yet. (That’s why I’ve not inserted the hyperlink.) First take the quiz and then check your answers.