The guard checked our bags at the museum.
那位警衛在博物館檢查了我們的包包。
A guard stands at the school gate every morning.
每個早上都有一位警衛站在校門口。
We asked the guard for help when we got lost.
我們迷路時向警衛求助。
Two guards walked around the concert to keep it safe.
兩位警衛在演唱會周圍巡邏以維持安全。