单项选择题

The news of the air crash is not yet（）by the government.

A．committed
B．confirmed
C．considered
D．concerned

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单项选择题

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

A．sure
B．right
C．exact
D．certain

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

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