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．She’s going to the eye doctor.B．She’s supervising new employees.C．She’s having her dinner in the cafeteria.D．She’s looking for some help.
A．She’s going to the eye doctor.
B．She’s supervising new employees.
C．She’s having her dinner in the cafeteria.
D．She’s looking for some help.
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