23.According to the passage, Tenochtitlan was ________.
(A) a city built upon three causeways
(B) a metropolis surrounding Lake Texcoco
(C) the political center of the Aztec empire
(D) where the Great Pyramid of Giza once stood

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統計： A(8), B(5), C(2), D(5), E(0) #1288189