UC知道If___carefully,your final exam will be successful.
来源：百度知道 编辑：UC知道 时间：2024/05/31 22:18:37
A preparing B prepared以及原因
A preparing动名字表主动
Bprepared 过去分词表被动
所以选A
A, if+doing
A
If preparing carefully, your final exam will be successful.
还未发生，非常期待
If prepared carefully, your final exam would be successful.
已经完成，懊悔不已