单项选择题

This passage is mainly about _______.

A．different kinds of stamps in different countries
B．an organization that makes rules
C．international mail
D．the size and weight of letters
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单项选择题
One has to wait for 2 days or longer for a reply if he she pays ______.
A．in person
B．by telephone
C．by fax
D．by post
单项选择题
What is a useful number to call at 11 a. m. on Sunday
A．01789 295623
B．0541 541051
C．01789 261174
D．01862 387665
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