单项选择题

Figures showed that security screeners were ______ dangerous items.

A．able to detect
B．not able to detect
C．not effective in detecting
D．very effective in detecting
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单项选择题
The possible mason for hundreds of airport employees being arrested might be one of the following except ______.
A．using false ID
B．helping others in smuggling
C．being in the US illegally
D．denying or not mentioning past crimes
单项选择题
Who is are against the point that. pilots need to be armed
A．Pilots
B．Federal agents
C．The administration
D．Two members of the House Transportation Committee
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