6 Detector dogs are conducive to _______ drug smuggling due to their smell sensitivity, fast hunting skills, and high flexibility for checking inbound or outbound passengers, luggage, postal parcels, and express consignments.
(A) getting along with
(B) coming up with
(C) getting rid of
(D) cracking down on
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統計: A(1), B(2), C(1), D(5), E(0) #3454882
統計: A(1), B(2), C(1), D(5), E(0) #3454882