14. As new threats were reported, the airport ________ procedures that included stricter guidelines on passenger and luggage screening.
(A) collected
(B) implemented
(C) canceled
(D) conspired

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統計： A(2), B(75), C(13), D(7), E(0) #1573217

詳解 (共 3 筆)

#2705916
As new threats were ...
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#4216989
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#4241633
As new threats were ...
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