单项选择题

It can be inferred that the author is ______ the potential effectiveness of the Department of Homeland Security.

A．uncertain about
B．dubious about
C．confident of
D．critical about
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单项选择题
Why is the author almost certain about the establishment of the Homeland Security
A．Because he also thinks of it as necessary.
B．Because the Congress is obedient to the President.
C．Because it is a symbol of the leaders' active response.
D．Because terrorism is hard to crack down.
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