I don't know______or not.A.whether he is at home B if he is at home C that he is at homeD whether is he at home

I don't know______or not.A.whether he is at home B if he is at home C that he is at homeD whether is he at home
I don't know______or not.A.whether he is at home B if he is at home C that he is at home
D whether is he at home

I don't know______or not.A.whether he is at home B if he is at home C that he is at homeD whether is he at home
选A
whether or not 连用.

A 我不知道他是否在家。

whether or not固定搭配，所以排除BC
这里I don't know后面的从句部分，要用陈述语序，所以选择A
希望对你有帮助哦~