Yes, they are
他们───they;的───Of
I withheld payment until they had fulfilled the contract.───他们履行合同后,我才付款.
They were detailed to look for water.───他们被派去找水.
When will they name a successor?───他们什么时候会任命继承人?
They just handed the game to the other team on a plate.───他们让另一支球队轻易地赢得了这场比赛.
They were ready to die , if necessary, for their country.───必要时, 他们愿为国捐躯.
They tried to smother up the murder by pretending that her death was accidental.───他们谎称她是意外死亡以掩盖谋杀事实.
They imprisoned many of those they caught.───他们把抓来的许多人关入了监狱.
They refused to be enslaved and rose in struggle.───他们不甘心受奴役而起来斗争了.