交换

我们交换了电话号码

wǒmen jiāohuàn le diànhuà hàomǎ

We exchanged phone numbers

交换意见很重要

jiāohuàn yìjiàn hěn zhòngyào

Exchanging opinions is important

学生们交换礼物

xuéshengmen jiāohuàn lǐwù

The students exchanged gifts