"I can not find my key."

Translation: Я не можу знайти мій ключ.

[mzbka]

Why is свій not used here? Я не можу знайти свій ключ.

[skstudio]

"Я не можу знайти свій ключ" is accepted too. Since the possessive pronoun свій is not taught in the course, the corresponding translation is not shown.