阿摩線上測驗
50. While one set of dancers move clockwise, another set dance counterclockwise, resulting in a moving pattern of ______ colors.
(A) boring
(B) dull
(C) quiet
(D) vibrant
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統計： A(4), B(9), C(5), D(98), E(0) #3446528
統計： A(4), B(9), C(5), D(98), E(0) #3446528
