单项选择题

When a liquid boils,it becomes a gas.

A．vapor
B．danger
C．fuel
D．bubble
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单项选择题
The works of Walt Whitman had a lasting effect on the development of modern American poetry.
A．an enduring
B．an unknown
C．a startling
D．a final
单项选择题
Eleanor Roosevelt's dedication to humanitarian causes won her affection and honor at home and abroad.
A．on the air
B．henceforth
C．nearby
D．in foreign countries
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