問題詳情

52. After careful planning and a lot of work,the laboratory________ into a media center earlier this year.
(A) which transforms
(B) was transformed
(C) had to transform
(D) has been transforming

參考答案

答案:B
難度:適中0.568709
統計:A(148),B(956),C(121),D(456),E(0)

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