单项选择题

（）

A． Batteries.
B．Garden tools.
C．Cameras.
D．Light bulbs.

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单项选择题
In their experiments, Ray Friedman and his colleagues found that （）

A． blacks and whites behaved differently during the election
B．whites’ attitude towards blacks has dramatically changed
C． Obama’s election has eliminated the prejudice against blacks
D．Obama’s success impacted blacks’ performance in language tests
单项选择题
（）

A．Sunny.
B．Rainy.
C．Windy.
D．Cloudy.
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