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.