It is impossible to get to know a man in a couple of minutes,用doesn't还是isn't it?

It is impossible to get to know a man in a couple of minutes,用doesn't还是isn't it?
It is impossible to get to know a man in a couple of minutes,用doesn't还是isn't it?

It is impossible to get to know a man in a couple of minutes,用doesn't还是isn't it?
isn't it?是正确的

一般疑问句助动词问助动词答 be动词问be动词答