单项选择题

Scientific research results can now be quickly_______to factory production.

A．used
B．applied
C．tried
D．practiced
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单项选择题
The first two stages in the development of civilized man were probably the invention of weapons and the discovery of fire, although nobody knows exactly when he acquired the use of the_______.
A．latter
B．latest
C．later
D．last
单项选择题
Dreams are_______in themselves, but, when combined with other data, they can tell us much about the dreamer.
A．uninformative
B．startling
C．harmless
D．uncontrollable
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