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)