单项选择题

Only when ________with water can this liquid be used to clean wounds.

A．purified
B．devised
C．diluted
D．vaporized
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单项选择题
The new secretary has written a remarkably ________report only in a few pages but with all the details.
A．concise
B．clear
C．precise
D．elaborate
单项选择题
The design of this architecture shows a great deal of ________We have never seen a building of such a type before.
A．conventionality
B．originality
C．formulation
D．fascination
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