You should wear a helmet if you’re going ____________.
A. out for a walk B. swimming C. skateboarding D. fishing 

`tt\color{#9FB6CD}{\text{#Yuuri}`

`-` wear a helmet `(` `v` `)` : đội mũ bảo hiểm.

S `+` should `+` V-inf : Khuyên ai đó nên làm gì.

`⇒` Choose `C`.

$#Haneul$

You should wear a helmet if you’re going $\text{skateboarding}$. (đi trượt ván)

→ $\text{Dịch:}$ Going out for a walk (đi dạo bên ngoài)

                          Going swimming (đi bơi)

                          Going fishing (đi câu cá)