You've made some very respectable guesses! (I'm convinced that there are no right answers to this question, by the way! ) The It's or It is or It was and the who are invariable in all versions of this formula.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
CalifJim(I'm convinced that there are no right answers to this question, by the