We put on smart clothes when we took part in that event . (Use up to rewrite) Cứu mik vs

`1. ` We dressed up when we took part in that event.

gt:

dress up `= ` put on smart clothes: mặc quần áo lịch sự, trang trọng

When S-V: khi

take part in st: tham gia cái gì