Cup of Coffee

I was sitting across from X. I was teaching X English. I was testing him really hard. We were in a room and X had a cup of coffee in front of him, a coffee I had gotten for him. We were really working hard. I asked him a series of questions. He kept getting the answers wrong. Every time he would get an answer wrong, we would have to stop and I would have to reiterate a point. Finally, he got a crucial question correct. The moment he did, he took a sip of his coffee.