阿摩線上測驗
8. Elsa's moods ________ between depression and elation; no one exactly knows when she will be sad or happy.
(A)quail
(B) oscillate
(C) expound
(D) substantiate
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統計： A(7), B(39), C(2), D(4), E(0) #1735828
統計： A(7), B(39), C(2), D(4), E(0) #1735828
