活动人士在市中心广场分发关于环境保护的传单。

Activists were handing out ___leaflets about environmental protection in the city square.

旅游办事处提供免费的传单，上面有地图和当地景点的信息。

The tourism office provides free ___leaflets with maps and information about local attractions.

我在博物馆拿了一份介绍展览历史的传单。

I picked up a ___leaflet at the museum that explained the history of the exhibit.