单项选择题

It can be inferred from the passage that lighthouses in the Northeast did NOT need high towers because ______.

A．ships there had high masts
B．coastal waters were safe
C．the coast was straight and unobstructed
D．the lighthouses were built on high places
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单项选择题
It can be inferred from the passage that the Treasury Department, after assuming control of the lighthouse, improved which of the following
A．The training of the lighthouse keepers.
B．The sturdiness of the lighthouses.
C．The visibility of the lights.
D．The locations of the lighthouses.
单项选择题
According to the passage, where can the tallest brick lighthouse in the United States be found
A．Little Brewster Island.
B．The Florida Keys.
C．Cape Hatteras.
D．Cape Cod.
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