問題詳情

49. Penicillin is perhaps the drug ________ more lives than any other in the history of medicine.
(A) what has saved
(B) which saved
(C) which has saved
(D) who saves

參考答案

答案：C
難度：適中0.53125
統計：A(1),B(11),C(17),D(3),E(0)