ago

这座宫殿多年前被毁。

The palace was destroyed years ___ago.

六个月前，19岁的谢蕾告别家人和朋友，登上了飞往伦敦的飞机。

Six months ___ago, 19-year-old Xie Lei said goodbye to her family and friends and boarded a plane for London.

一分钟前，她在试图打开窗户时摔倒了。

A minute ___ago, she fell down while she was trying to open the window.