单项选择题

A．by
B．on
C．at
D．to
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单项选择题
What was the attitude in the 19th century toward resources of the sea
A．Declined.
B．Depleted.
C．Limited.
D．Unlimited.
单项选择题
What is the main thought expressed in this appeal
A．The museums are a financial success.
B．People are leaving New York rapidly.
C．The public should support cultural institutions.
D．Crocker Bank wants new depositors.
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