阿摩線上測驗
32 To signal for help, the officer fired a ________ into the night sky, alerting nearby vessels to their location.
(A) boarding ladder
(B) flare gun
(C) search light
(D) VHF radio
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統計： A(1), B(2), C(4), D(0), E(0) #3462286
統計： A(1), B(2), C(4), D(0), E(0) #3462286
