on my two days off与on my two-day off的区别

没区别的,不用太在意.I visited my parents( )A.on my two days offB.in my two days offC.on my two-day offD.in my two-day off（PS：单选）那么这道题改选啥？你应该是初中来着吧？我当年也总为这种题纠结，最后发现其实别人根本不注重这种小细节。这题我觉得应该选C吧。凭语感选的。