阿摩線上測驗
42. A sudden but unknown accident sent the aircraft _________ into the Mediterranean Sea.
(A) retorting
(B) retaining
(C) plundering
(D) plummeting
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統計： A(19), B(10), C(82), D(127), E(0) #1317235
統計： A(19), B(10), C(82), D(127), E(0) #1317235
