单项选择题

A．Enforcing laws controlling navigation, shipping, immigration and fishing.
B．Enforcing laws affecting the privately-owned boats in the U. S.
C．Searching for missing boats and rescuing people.
D．Training people to be good swimmers along the beach.
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单项选择题
A．Her subject’s home.B．Her subject’s social status.C．Her subject’s personality.D．Her subject’s role in history.
A．Her subject’s home.
B．Her subject’s social status.
C．Her subject’s personality.
D．Her subject’s role in history.
单项选择题
A．Have to buy a special electronic ticket.B．Need an expensive device designed especially for the museum.C．Have to travel a long way to visit the university. [D] Need a computer linked to a telephone.
A．Have to buy a special electronic ticket.
B．Need an expensive device designed especially for the museum.
C．Have to travel a long way to visit the university. [D] Need a computer linked to a telephone.
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