阿摩線上測驗
9. The exposé published by the investigative journalist served as a _____ for wide-ranging reform across the sector, spurred by mounting public outrage in the weeks following the initial disclosure.
(A)catalyst
(B)deterrent
(C)substitute
(D)benchmark
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統計： A(19), B(4), C(1), D(8), E(0) #3915260
統計： A(19), B(4), C(1), D(8), E(0) #3915260
