問題詳情

31. The ban will remain effective until it is proved that no traces of the ________ materials are present in the foods.
(A)nutritional
(B)toxic
(C)restrained
(D)exempt

參考答案

答案:B
難度:適中0.571429
統計:A(26),B(72),C(13),D(7),E(0)

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