i will marry him,whether you like him or not.

2楼正解。

能具体讲解下一楼错哪儿吗。谢谢

首先，要知道连接两个以上英语句子要应用连词或连词性结构。
no matter不是连词性结构，而no matter + what或how或which等有点靠谱。
whether是连词，适用。
No matter how (连词性结构)much she cares about his stepson, he is never moved.


If you add the word "whether" after "no matter", it will be correct.

是的，whether可做连词， no matter不可，充其量是个副词性结构。

No matter whether you like him or not, I will marry him.

No matter whether you like him or not, I will marry him.