it's only five-minutes walk还是it's only five-minute walk

it's only five-minutes walk还是it's only five-minute walk
it's only five-minutes walk还是it's only five-minute walk

it's only five-minutes walk还是it's only five-minute walk
it's only five-minute walk
five-minute中的-相当于把FIVE MINUTE变成形容词
可以直接修饰名词

It's only five minutes' walk或
It's only five-minute walk.

后者！