单项选择题

It is indeed much more difficult to______ a social reform on a large scale than just to talk about it.

A．bring up
B．bring forward
C．bring about
D．bring in
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单项选择题
The beam that is ______by a laser differs in several ways from the light that comes out of a flashlight.
A．emitted
B．transported
C．motivated
D．translated
单项选择题
The company are______ their new sort of tooth brush on television.
A．calculating
B．promoting
C．prompting
D．proceeding
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