单项选择题

An important part of the national government is the Foreign Service，a branch of theDepartment of State．（）

A．tree
B．division
C．root
D．leaf

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单项选择题

I rarely wear a raincoat because I spend most of my time in a car（）

A．normally
B．seldom
C．frequently
D．usually

单项选择题

He is a physician（）

A．researcher
B．professor
C．doctor
D．student

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