单项选择题

During the 1840’s, Dorothea Dix was a leader in the movement for the reform of prison conditions.

A．unification
B．creation
C．revival
D．betterment
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单项选择题
Against the advice of his accountants, Henry Ford regularly reduced the price of his early automobiles.
A．recklessly
B．hesitantly
C．greatly
D．routinely
单项选择题
An expert in any field may be defined as a person who possesses specialized skills and is capable of rendering very competent services.
A．obtaining
B．mastering
C．providing
D．financing
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