BTVN 30.09.2025

<p>BTVN 30.09.2025 unit 2<br>Exercise 1: tới câu 60<br>Hết exercise 5</p><p>https://docs.google.com/document/d/1f4Bp-ghujuzy0RbnWuGuKJTjhtB3MSu68W6…;