阿摩線上測驗
45.The reason the Mayan culture dropped in population is ___________.
(A) still unknown
(B) because the people wore out the soil
(C) because of the calendar
(D) because of war
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統計： A(639), B(73), C(85), D(48), E(0) #170871
統計： A(639), B(73), C(85), D(48), E(0) #170871
