Past Simple or Past Continuous

Choose between the Simple Past or Past Continuous tense.

 1. I lit the fire at 6 and it brightly when Tom came in at 7.

 2. When I arrived the lecture had already started and the professor on the blackboard.

 3. I a cake when the light went out. I had to finish it in the dark.

 4. I didn't want to meet Paulso when he entered the room I

 5. Unfortunately, when I arrived Ann just so we only had time for a few words.