我想给他们一些东西，以回报他们为我们所做的一切。

I'd like to give them something ___in ___return for everything they've done for us.

他帮我搬家，所以我做晚餐回报他。

He helped me move, so ___in ___return I cooked dinner for him.

作为感谢的象征，我送了她一份礼物以回报她的善意。

As a token of gratitude, I gave her a gift ___in ___return for her kindness.