我们经常一起喝咖啡，她已经成为了我最好的朋友。

We often have coffee together, and she has become my best ___friend.

她一直是教育公平事业的忠实朋友。

She has always been a loyal ___friend to the cause of educational equality.

她刚刚在Instagram上加了她新同学为好友。

She just ___friended her new classmate on Instagram.