I not sure student who are interested in Chinese are more li

I'm not sure that student who are interested in Chinese are more likely to show interest in English,这句话的意思是：我不确定对中文感兴趣的同学的对英语更感兴趣,明显的看出来,语句不通顺,如果选whether ,I'm not sure whether student who are interested in Chinese are more likely to show interest in English我不确定对中文感兴趣的同学的是否会对英语更感兴趣.

这个who 指代的是这个student，定语从句中修饰人的，要用who来做连接词
whether是是否的意思