单项选择题

The special workshop was ______ over by a famous scientist.

A．presided
B．administered
C．mastered
D．executed
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单项选择题
We rarely perceive more than minute ______ of the sights and sounds that fall upon our sense organs; the great majority passes us by.
A．fiction
B．function
C．friction
D．fraction
单项选择题
I have said that I will ______ this opinion until contrary facts appear.
A．adhere to
B．tangle with
C．devote to
D．keep with
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