士兵们守卫着大使馆的主要入口。

Soldiers ___guard the main doors of the embassy.

一个男人用一条不友好的猎犬守卫着那栋可疑的旧房子。

A man ___guards the dodgy-looking old house with an unfriendly hound.

她小心地守卫着她的珠宝以防被盗。

She ___guards her jewelry carefully to prevent theft.