It was reported that a fire broke out in a tall building in Beijing on Thursday afternoon. No one was killed in the fire. The building, which caught fire, is near the three-tower shopping and office complex(综合体) named Xihuan Plaza. One of the three towers was in heavy smoke because of the polyfoam（泡沫塑料）outside. The fire was put out at about 3:34 pm, 16 minutes after the firemen received alarms（报警）.
Witnesses said the fire broke out at about 3:15 pm. The shopping center had people inside evacuated（疏散）shortly after the fire. By 4:50 pm, all the workers from the center returned.
小题1: The fire happened on a ▲ , when people were working in the office.
小题2: When the firemen put out the fire, the fire lasted for ▲ minutes.
小题3: The workers went back to work ▲ an hour after the fire was put out.
小题4: Though the fire frightened people there, it killed ▲ .
小题5: The fire didn’t ▲ until it was 3:34.