阿摩線上測驗
47. What does “a crucial time” in the last paragraph refer to?
(A) When the vessel hits a flat.
(B) When the channel is not deep enough.
(C) When there is a collision of two ships.
(D) When a ship is waiting to enter the port.
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統計： A(40), B(34), C(27), D(219), E(0) #2160301
統計： A(40), B(34), C(27), D(219), E(0) #2160301
