单项选择题

This is one of the rarest questions that ______ at such a meeting.

A．is raised
B．are raised
C．has ever been raised
D．have ever been raised
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单项选择题
Although the national government has introduced some new laws on this subject, it is ______the state governments which are responsible for pollution control.
A．precisely
B．primarily
C．progressively
D．preliminarily
单项选择题
Although Jim is happy with his success he wonders ______ will happen to his private life.
A．that
B．what
C．this
D．it
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