tour (n)

我们参加了为期五天的欧洲旅行，游览了巴黎、柏林和阿姆斯特丹。

We took a five-day ___tour of Europe, visiting Paris, Berlin, and Amsterdam.

这位歌手正在进行全国巡演，将在20个城市举办演唱会。

The singer is on a nationwide ___tour, performing in 20 cities.

学校组织了一次城市历史景点的观光游览。

The school arranged educational ___tours of historical sites in the city.

巴士观光游览持续大约两个小时。

The bus ___tour lasts about two hours.