他们经常在游戏里交换卡片。

They often ___swap cards when playing games.

她不喜欢这件衬衫的颜色，所以把它换成了蓝色的。

She didn't like the color of the shirt, so she ___swapped it for a blue one.

我们在聚会上交换了礼物。

We made ___swaps of gifts at the party.