阿摩線上測驗
31. In dealing with each other, the Native American tribes of the Great Plains used an intricate sign language that consisted of a series of mutually understanding gestures.
(A)each other
(B)used
(C)consisted of
(D)understanding
(E)gestures
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統計： A(3), B(4), C(11), D(13), E(1) #1021192
統計： A(3), B(4), C(11), D(13), E(1) #1021192
