单项选择题

A．Because the seals came to American shores.
B．Because the sealers were in American territorial waters.
C．Because the United States had purchased all the waters off Alaska.
D．Because there were no regulations for sealing,
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单项选择题
A．She had to go home.B．She was too tired to continue.C．She had to finish her schoolwork.D．She was thirsty.
A．She had to go home.
B．She was too tired to continue.
C．She had to finish her schoolwork.
D．She was thirsty.
单项选择题
A．Taking the air.B．By plane.C．On radio and TV.D．At the airport.
A．Taking the air.
B．By plane.
C．On radio and TV.
D．At the airport.
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