阿摩線上測驗
3. While her tone seemed polite on the surface, the underlying message was so ______ that several participants felt subtly insulted.
(A) conciliatory
(B) benign
(C) caustic
(D) deferential
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統計： A(2), B(1), C(12), D(3), E(0) #3853683
統計： A(2), B(1), C(12), D(3), E(0) #3853683
