阿摩線上測驗
28 Over the past two decades, 77 firefighters have lost their lives in the ________ of duty, according to the National Association for Firefighters in Taiwan.
(A)line
(B)break
(C)cast
(D)tour
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統計： A(3), B(3), C(4), D(5), E(0) #3930641
統計： A(3), B(3), C(4), D(5), E(0) #3930641
