flag|flags

所有二十七国的国旗都在大楼外飘扬。

___Flags of all twenty-seven countries are flying outside the building.

警卫挥动他的旗子，火车驶离了车站。

The guard waved his ___flag and the train pulled away from the station.

我们每周一升旗。

Every Monday we raise the ___flag.