阿摩線上測驗
34. The policeman is quite concerned about ____ or not the suspect is telling the truth.
(A) how
(B) when
(C) whether
(D) whichever
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統計： A(10), B(6), C(483), D(19), E(0) #3154135
統計： A(10), B(6), C(483), D(19), E(0) #3154135
