2.1Was the radio playing soft music all morning yesterday? The radio wasn't playing soft music all morning yesterday.
2.2 Were the students having a test when the alarm rang?The students weren't having a test when the alarm rang.
2.3Was an old lady crossing the road? An old lady wasn't crossing the road.
2.4Was the secretary typing a letter when her boss arrived?The secretary wasn't typing a letter when her boss arrived.
2.5Were they dancing from 8 to 12 last night? They weren't dancing from 8 to 12 last night.