单项选择题

What is this news mainly about

A．The February 1 space shuttle "Columbia" mishap.
B．Some pointed questions from some Republican representatives.
C．The independence of the Columbia Accident Investigation Board.
D．The establishment of the NASA Accident Investigation Board.
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单项选择题
What is the profession of the speaker
A．A historian.
B．A social worker.
C．A political leader.
D．An old soldier.
单项选择题
What are these people talking about
A．The room.
B．The heat.
C．The workload.
D．The air-conditioner.
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