阿摩線上測驗
6. Flying in the air was once regarded as a ____ and crazy idea before the invention of airplanes.
(A) xenophobic
(B) acephalous
(C) blithe
(D) whimsical
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統計： A(15), B(8), C(10), D(70), E(0) #2909034
統計： A(15), B(8), C(10), D(70), E(0) #2909034
