单项选择题

Why does the author mention the Massachusetts Bay Colony

A．It was the headquarters of the United States Lighthouse Board.
B．Many of the tallest lighthouses were built there.
C．The first lantern wicks were developed there.
D．The first lighthouse in North America was built there.

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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.

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.