Yesterday I was flying vfr and headed inbound to the airport, I proceeded to make a simulated fire emergency landing. I ran the checklist then I put twenty degrees of flaps in on downwind and then thirty on base. I noticed I was a little bit high, I slipped the airplane right and then heard a popping sound. The speed I put the flaps down was at normal flap operating speed. I looked over and the left flap was up and the right one was down. My first reaction when I heard the pop was something just broke, and then I saw what was going on. I was about 200 feet high and coming down to the threshold. I was thinking about putting the flaps up but then I decided not to because the airplane was still flying well. I made the landing and the cable to the left wing flap had broken. Any suggestions on configuring the airplane or leaving it like it was in the air?