单项选择题

A good scientist ______ into all aspects of a problem in order to find solutions.

A．pricks
B．pokes
C．probes
D．peers
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单项选择题
In his unhappiness he had come even to question his ______.
A．diversity
B．entity
C．prosperity
D．minority
单项选择题
Have you any proof that a headless ghost ______ that house
A．hunted
B．examined
C．haunted
D．wandered
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