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
She got the job through ______ persistence.
A．perfect
B．total
C．sheer
D．integral
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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