单项选择题

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单项选择题
The U.S. Space Agency NASA says ______ orbiting Mir space station has lost its primary and backup oxygen sources.
A．America’s
B．Britain’s
C．Russia’s
D．Japan’s
单项选择题
Which of the following players was once two time French Open Champion
A．Michael Chang.
B．Pete Sampras.
C．Sergei Brugera.
D．Jacob Hasic.
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