问题
on’sstory proves that to be a hero has nothing to do with size, ________ with asmart mind and a brave heart
A:did I turn; did Iknow
B:did I turn; Iknew
C:I turned; did Iknow
D:I turned; Ihad know
B:did I turn; Iknew
C:I turned; did Iknow
D:I turned; Ihad know
正确答案是：
