单项选择题

Some of the scientists assert that there is ______ UFO in the world.

A．no such thing as
B．no such thing as an
C．no such a thing as a
D．no such thing as a
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单项选择题
He discovered that ______ old friend of his was one of ______ members of the jury at his trial.
A．an, the
B．an, /
C．the, the
D．/, /
单项选择题
The manager disapproved of the plan that Sam had ______ over night.
A．drawn up
B．drawn off
C．drawn back
D．drawn on
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