我们委托了一位旅行代理商帮我们预订机票和酒店。

We hired a travel ___agent to book our flights and hotels.

那名特工成功获取了敌方的重要情报。

The ___agent successfully obtained crucial intelligence from the enemy.

这种发酵剂是让面包发酵的关键成分。

This ___agent is essential for making bread rise.

阳光是大自然的消毒剂，能杀死许多有害细菌。

Sunlight is a natural ___agent that kills many harmful bacteria.

她的经纪人帮她签了一份新电影的合约。

Her ___agent helped her sign a contract for a new movie.