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
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单项选择题
The company are______ their new sort of tooth brush on television.
A．calculating
B．promoting
C．prompting
D．proceeding
单项选择题
During an earthquake, the great part of damage and loss of life has been______ collapse of buildings and the effect of rockslides, floods, disease, and other phenomena resulting from earthquakes, rather than from the quakes themselves.
A．due to
B．owing to
C．by reason of
D．on account of
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