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
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单项选择题
The boy spent as much time watching TV as he______ studying.
A．does
B．had
C．was
D．did
单项选择题
He wasn't appointed chairman of the committee, ______ not very popular with all its members.
A．to be considered
B．considering
C．being considered
D．having considered
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