3. Twenty years before the Titanic _____ maritime history, another ship touted as the next great technological feat set sail on the Great Lakes.
(A) changing
(B) which has changed
(C) was changing
(D) changed
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統計: A(5), B(1), C(1), D(14), E(0) #3430689
統計: A(5), B(1), C(1), D(14), E(0) #3430689