单项选择题

It isn't quite ______ that he will be present at meeting.

A．sure
B．right
C．exact
D．certain
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单项选择题
It is highly desirable that a new president ______ for this university.
A．is appointed
B．will be appointed
C．be appointed
D．has been appointed
单项选择题
It was in that small room ______ they worked hard and dreamed of better days to come.
A．where
B．in which
C．which
D．that
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