问题
In the end , he turned ______history teacher, who had______ good knowledge of history, especially ______ history of ______Ming Dynasty.
A:a,/,the, a
B:/,a ,the, the
C:/,a, the,/
D:a, a, the,/
B:/,a ,the, the
C:/,a, the,/
D:a, a, the,/
正确答案是：
