单项选择题

A．To search for the missing people.
B．To investigate a fire on one of the islands.
C．To look for the missing woman.
D．To rescue the British soldiers.
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单项选择题
A．To drive the train after it is started automatically.B．To start the train and drive it when necessary.C．To take care of the passengers in the train.D．To send commanding signals to the command spot.
A．To drive the train after it is started automatically.
B．To start the train and drive it when necessary.
C．To take care of the passengers in the train.
D．To send commanding signals to the command spot.
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