单项选择题

A．An environment protector.
B．A visiting scholar.
C．An engineer on construction.
D．A tourist who have visited Alaska.
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单项选择题
A．An orchestra conductor.B．An music fan.C．A sales manager in a music company.D．A background music composer.
A．An orchestra conductor.
B．An music fan.
C．A sales manager in a music company.
D．A background music composer.
单项选择题
A．Six Units.B．Fourteen Units.C．Sixteen Units.D．Ten Units.
A．Six Units.
B．Fourteen Units.
C．Sixteen Units.
D．Ten Units.
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