敌军围困了这座城市，切断了所有补给线。

The enemy ___besieged the city, blocking all supply routes.

粉丝们围住这位歌手索要签名。

Fans ___besieged the singer with requests for autographs.

这位演员最近一直被狗仔队的骚扰所困扰。

The actor has been ___besieged by paparazzi harassment recently.