阿摩線上測驗
23. Considering safety, you shall use the ______ of tug boats instead of your own vessel’s.
(A) towing lines
(B) shore lines
(C) stream lines
(D) base lines
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統計： A(23), B(1), C(1), D(1), E(0) #4022389
統計： A(23), B(1), C(1), D(1), E(0) #4022389
