問題詳情

22. A Chinese scientist who had created the world’s first genetically modified babies revealed that he _____something wrong and regrettable.
(A) has done
(B) had done
(C) is doing
(D) does

參考答案

答案:B
難度:簡單0.75
統計:A(0),B(3),C(1),D(0),E(0)

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