阿摩線上測驗
31 The notorious candidate's speech was full of vague generalizations, offering no ______ solutions to the problem.
(A) obscure
(B) concrete
(C) doubtful
(D) indistinct
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統計： A(1), B(4), C(0), D(3), E(0) #4002898
統計： A(1), B(4), C(0), D(3), E(0) #4002898
