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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.
单项选择题
A．Anthony fixed it.B．The plumber fixed it.C．It was left leaking.D．It was removed.
A．Anthony fixed it.
B．The plumber fixed it.
C．It was left leaking.
D．It was removed.
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