6.
(A) The train has already left when I arrived at the station.
(B) When I arrived at the station, the train would have already left.
(C) The train had already left when I arrived at the station.
(D) When I arrived at the station, the train has already been leaving.
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統計: A(0), B(0), C(6), D(0), E(0) #3298472
統計: A(0), B(0), C(6), D(0), E(0) #3298472