他们的笑声充满了房间。

Their laughter ___fills the room.

这项服务填补了市场上对快速物流的需求。

This service ___fills the need for fast delivery in the market.

她把行李箱装满了衣服。

She ___fills the suitcase with clothes.

她临时接替了生病的老师来上课。

She ___fills in for the sick teacher to teach the class.