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单项选择题
A．Being too hot.B．Being delayed.C．Catching the beach ball.D．Getting up early.
A．Being too hot.
B．Being delayed.
C．Catching the beach ball.
D．Getting up early.
单项选择题
A．An alloy of copper and silver.B．Pure silver or pure gold.C．An alloy of copper and fin.D．An alloy of gold and silver.
A．An alloy of copper and silver.
B．Pure silver or pure gold.
C．An alloy of copper and fin.
D．An alloy of gold and silver.
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