I was not quite sure .A. what is she looking forB. why she came late for schoolC. how did

问题补充：

I was not quite sure .

A. what is she looking for

B. why she came late for school

C. how did she deal with the problem

D. if she has arrived

答案：

A. what is she looking for

B. why she came late for school

C. how did she deal with the problem

(答案→)D. if she has arrived

解析：英语宾语从句中一般用陈述语序。选项AC为倒装语序。选项B意思是她为什么上学迟到了；选项D意思是她是否已经到达了。结合语境可知选D，我不太确定她是否已经到达了。