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A．Because he was never afraid of anything.
B．Because he was protected by a special medium.
C．Because he had enough experience.
D．Because it was his job.
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单项选择题A．To honor Swiss heroes who died in the war.B．To show Switzerland was neutral.C．To pay tribute to Switzerland.D．To show gratitude to the Swiss government for its financial support.

A．To honor Swiss heroes who died in the war.
B．To show Switzerland was neutral.
C．To pay tribute to Switzerland.
D．To show gratitude to the Swiss government for its financial support.

单项选择题Two Australian billionaires have been placed on the waiting list for entering space as private passengers.

A．Y
B．N
C．NG