At a time when it was unusual to do it. Dorothy Sterling wrote about such major figures of Black history as Harriet Tubman and W. E. B. Du Bois.
-
Ait was unusual to do it
分析该选项
-
Bit was unusual to do so
分析该选项
-
Cdoing that was unusual
分析该选项
-
Dthat was an unusual thing to be doing
分析该选项
-
Eit was not usual to do
分析该选项
显示答案
正确答案: B