impulsive

做冲动的决定常常导致后悔。

Making ___impulsive decisions often leads to regrets.

她很聪明，但也冲动且难以捉摸。

She's bright but also ___impulsive and unpredictable.

他一时冲动，张开双臂抱住了她。

In an ___impulsive gesture, he threw his arms around her.