单项选择题

Project Skylab was designed to demonstrate that a person can work and live in space for prolonged periods without ill effects.

A．unexpected
B．obvious
C．adverse
D．immediate
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单项选择题
Mary boasted that she would succeed where others had failed.
A．threatened
B．warned
C．bragged
D．joked
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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