in my reading, it refers to "suit" but you can ask your classmates for advice.

我竟然問我老師QQ 不應該拿這種蠢問題問老師… 我也覺得應該是套裝~謝謝珊哦!

Questions are always welcome, which is better than making a mistake or going the wrong way.

穿西裝褲配襯衫應該也OK

Anciwu: 不會啦 千萬別這麼想 很常見的迷思其實就是問問題=很蠢 但其實有很多東西真的要問就問 沒關係的呀

謝謝妳們的建議呀!btw謝謝珊>w< 在我刪之前妳看到了我寫的了