阿摩線上測驗
31. The investigation revealed that the ________ between the two boats was caused by poor visibility and a failure to follow proper navigation rules.
(A) argument
(B) collision
(C) instrument
(D) frustration
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統計： A(3), B(6), C(1), D(1), E(0) #3930864
統計： A(3), B(6), C(1), D(1), E(0) #3930864
