单项选择题

The results are hardly ______ ; he cannot believe they are accurate.

A．crucial
B．critical
C．credible
D．contrary
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单项选择题
______ that the demand for power continues to rise at the current rate, it will not be long before traditional sources become inadequate.
A．Concerning
B．Regarding
C．Ascertaining
D．Assuming
单项选择题
The boy spent as much time watching TV as he______ studying.
A．does
B．had
C．was
D．did
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