单项选择题

Although it was his first experience as chairman, he （）over the meeting with great skill.

A．presided
B．administered
C．mastered
D．executed

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单项选择题
When he tried to make a （）he found that the hotel was completely filled because of a convention.

A．reservation
B．claim
C．mess
D．revision
单项选择题
Parents take a great interest in the （）questions raised by their children.

A．nasty
B．naive
C．obscure
D．offensive
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