单项选择题

A．A sick friend.
B．A math class.
C．School policy.
D．The man’s test.
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问答题
S1. What does the passage mainly talk about
单项选择题
A．The history of Benjamin Franklin.B．The history of the U.S. mail.C．The Changes of writing letters.D．The history of U. S.
A．The history of Benjamin Franklin.
B．The history of the U.S. mail.
C．The Changes of writing letters.
D．The history of U. S.
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