单项选择题

A new president in America is elected every ______.

A．five years
B．six years
C．four years
D．three years
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单项选择题
What did the boxing competition aim to do
A．To train the children to be professional boxers.
B．To teach the children to follow rules.
C．To give the children some physical exercise.
D．To cultivate the children’s sense of competition.
单项选择题
Russia and the US agreed in 1996 that Russia would provide the US
A．necessary supplies until next April.
B．technological support until next April.
C．free crew and cargo transportation to the station until next April.
D．crew and cargo transportation to the station at some charge.
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