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A．Unregistered mail.
B．Recorded delivery.
C．Registered delivery.
D．Urgent mail.
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A．the impact of globalizationB．the impact of U. S. budget deficitC．the rise of unemployment rate in ChinaD．the debt relief of the poor countries
A．the impact of globalization
B．the impact of U. S. budget deficit
C．the rise of unemployment rate in China
D．the debt relief of the poor countries
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