I used this listening exercise as a warm-up for part 2 of my "used to/didn't use to" lesson plan. The rest of the lesson consisted of talking about inventions and what life was life before and after the invention.
I put the students in groups of 4 or 5 and gave them the questions beforehand and gave them a couple minutes to read them. Then, I showed the Thomas Edison video one time and gave them 2 minutes to talk with their group and try to fill in the answers. Then, I showed the video a second time and gave them 3-4 minutes to again talk with their group. Then, I checked the answers and the group with the most questions right got a little prize.