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.
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单项选择题
A．Every weekends.B．Frequently.C．Occasionally.D．Rarely.
A．Every weekends.
B．Frequently.
C．Occasionally.
D．Rarely.
单项选择题
A．aboutB．withC．intoD．toward
A．about
B．with
C．into
D．toward
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