单项选择题

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
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单项选择题
Eye witnesses say there was ____ as the tunnel began to fill with smoke.
A．a body of the dead
B．a special commission
C．a panic
D．bomb attacks
单项选择题
According to the passage. The Catastraphic event happened due to ____ .
A．a shortage of electricity power
B．bombing
C．misoperation
D．a technical fault
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