我多买了一份披萨以防不够吃。

I bought an ___extra pizza in case there wasn't enough.

她今天格外用心地准备了晚餐。

She was ___extra careful when preparing dinner today.

他在那部电影里当了个群众演员，只露了个脸。

He was an ___extra in that movie, just appearing briefly in the background.

酒店对额外的毛巾收费。

The hotel charges ___extra for additional towels.