nothing is wrong with my watch,_______ 用is it 还是 isn't it

问题描述:

nothing is wrong with my watch,_______ 用is it 还是 isn't it

Nothing is wrong with my watch,(is it)?
我的手表没毛病,对吗?
因为陈述部分有否定词nothing,所以疑问部分要用肯定.