单项选择题

A．were
B．are
C．used
D．had been
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单项选择题
A．coveredB．crowdedC．fullD．plenty
A．covered
B．crowded
C．full
D．plenty
单项选择题
When were women’s swimming events first introduced
A．In 1900.
B．In 1912.
C．In 1928.
D．In 1930.
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