单项选择题

During the oil crisis of the 1970s, many states ______ speed limits to reduce gasoline use.

A．implanted
B．imposed
C．impaired
D．impressed
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单项选择题
With her last child having left home, she felt a ______ need to fill her time.
A．tense
B．thorough
C．pressing
D．small
单项选择题
Fear of pirate ______ led the French to fortify their coastline.
A．excursions
B．incursions
C．transmigrations
D．transmogrifications
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