阿摩線上測驗
28 When arriving at a maritime collision, coast guards must first ________ the area to prevent further accidents involving people and nearby vessels.
(A) disturb
(B) leave
(C) observe
(D) secure
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統計： A(0), B(2), C(2), D(4), E(0) #3462282
統計： A(0), B(2), C(2), D(4), E(0) #3462282
