問題詳情
31. It was announced that only when the fire was under control ___ to return to their homes.
(A) the residents would be permitted
(B) had the residents been permitted
(C) would be residents be permitted
(D) the residents had been permitted
參考答案
答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)