单项选择题

A．He established a government service.
B．He developed a system called "star routes".
C．He built a lot of post offices.
D．He established the postal system.
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单项选择题
A．He left his notes in class.B．He had to borrow the notes from his classmates.C．He doesn’t have an exam.D．He loaned his notes to a classmat
A．He left his notes in class.
B．He had to borrow the notes from his classmates.
C．He doesn’t have an exam.
D．He loaned his notes to a classmat
单项选择题
A．The British government.B．The private contractors.C．Benjamin Franklin.D．George Washington.
A．The British government.
B．The private contractors.
C．Benjamin Franklin.
D．George Washington.
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