阿摩線上測驗
15.The researchers were shocked to find that the ancient manuscript ___________ before they had the chance to examine it.
(A) disappears
(B) was disappearing
(C) had disappeared
(D) has disappeared
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統計： A(0), B(1), C(14), D(0), E(0) #3427173
統計： A(0), B(1), C(14), D(0), E(0) #3427173
