听力原文：Officials in the former Soviet Republic of Azerbaijan now fear more than 300 peop

听力原文： Officials in the former Soviet Republic of Azerbaijan now fear more than 300 people were killed Saturday in a huge subway fire. Peter Collins has de tails in Moscow. "The fire broke out Saturday evening in an underground railway train as it was moving between two subway stations in central Baku. Reports say an electrical fault, perhaps a high voltage spark or a motor catching fire, set the train ablaze. It stopped trapping hundreds of passengers underground in thick smoke. Most victims apparently died of carbon monoxide poisoning. Eye witnesses say there was panic as the tunnel began to fill with smoke. Passengers broke windows in their attempts to get out. Rescue workers who struggled throughout the night to pull out bodies of the dead said the smoke was so thick at first that they were unable to get to the train. Azeri President Gaidar Aliev has set up a special commission to investigate the fire. It has yet to announce its findings but President Alley suggested on television that a technical fault was to blame. Some 20 people have died and dozens have been injured in two bomb attacks in the Baku subway system over the past 18 months."

Officials in the former Soviet Republic of Azerbaijan now fear ______ in the huge subway fire.

A．an electrical fault

B．a high voltage spark

C．more than 30 people were killed Sunday

D．more than 300 people were killed Saturday