题目

The first time we started using it, we thought it would just be a bit of fun, a one-time thing. “Let’s just give it a try,” my fiancée said. I was a bit nervous, but I knew some of our friends were already into it, and they said it was fine and that I should relax because everyone was doing it. “OK,” I agreed, convinced it would be harmless. I have never so wrong in my entire life Before long, we were using it once a week. Then it became twice a week. We went from using it after work to using it in the mornings, and then at lunchtime, too. Suddenly we reached a point where等于（ ）A. B. C. D.