单项选择题

Passage Two
Questions 29 to 31 are based on the passage you have just heard.
29-31
(30、31) A six-year-old boy has been found alive after spending four days and five nights in an icebox that was buried under tons of ruins in Thursday’s big earthquake. The boy Tom was found early yesterday in the village of Sere as rescuers were working to pull his father out of the ruins of their home. Hearing a faint cry of "Get me out. Get me out", rescuers dug down another one point five meters and found the boy in the icebox. (29) He was pronounced in a good condition, suffering only four or five slight wounds. Tom’s eight brothers and sisters died in the earthquake which officials say may have killed as many as 50,000 people, By Sunday foreign doctors were leaving the earthquake areas as hope had faded of finding any more survivors.

How did the boy survive the big earthquake()

A. His father pulled him out in time.
B. He stayed in an icebox.
C. He left the area before the earthquake.
D. Their house escaped the earthquake.