—She‘s broken her arm again.—Again? I ______ she _______ ever br

—She‘s broken her arm again.
—Again? I ______ she _______ ever broken it before.
A、don‘t know; has
B、didn’t know; had
C、didn‘t know; has
D、hadn’t know; would
【正确答案】：B
【题目解析】：最后一句表达的是：我之前不知道他已经断过了, I didn't know表示我之前不知道，用一般过去式即可。had been broken 表示在I didn't know 的之前，是过去的过去，要用过去完成时。