单项选择题

______ it or not, his discovery has created a stir in scientific circles.

A．Believe
B．To believe
C．Believing
D．Believed
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单项选择题
We gave out a cheer when the red roof of the cottage came ______ view.
A．from
B．in
C．before
D．into
单项选择题
The police ______ that he committed a series of crimes in the north of the city.
A．swelled
B．submitted
C．surveyed
D．suspected
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