I have not found my book yet; in fact ,I am not sure__I could have done with it .明白选what
为什么whether不行?我还没找到我的书,我不确定是否我把它处理了.不可以么?
I am not sure what I could have done with it ."我不知道该怎么办"还是“我不确定我把它怎么了?”