morning.本题询问这场大火起于当天何时。根据文章第二句话“An early morning fire damaged the historic Geller House today．”可知发生在凌晨。

Now, back to the news. (11) An early morning fire damaged the historic Geller House today. (12) It destroyed the third floor of the building. But the firefighters saved the first and second floors. (13)There were only a few elderly people living in the building at that time. And they were carried out to safety. (14) The Geller House was built in 1718 and was used as a hotel for over 150 years. George Washington stayed there in 1782. Five years ago it was made into a building for the elderly. Several fire departments were called to the scene. When we asked the fire chief how the fire started, (15) he answered that most likely a burning cigarette caused it. He promised to make a further investigation into the cause.