79. Which of the following is NOT mentioned in the passage as the causes why languages become endangered?
(A) Earthquake
(B) War
(C) Not passed on to children
(D) International trade
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統計: A(29), B(2), C(4), D(44), E(0) #568848
統計: A(29), B(2), C(4), D(44), E(0) #568848