He had worked alongside Frank and Mark and they had become friends.

他曾与弗兰克和马克并肩工作过，他们已经成为朋友了。

《柯林斯英汉双解大词典》

None of them would become friends with White Fang.

他们中没有一个会和白牙成为朋友。

youdao

People usually become friends because they have something in common.

人们之所以会成为朋友，是因为他们有共同点。

youdao

This means that people who are alike often become friends or spend time together.

VOA: special.2009.03.01

I think we all understand the importance of children growing up together and having the opportunity to work together to become friends, to learn the results of conflicts and to basically interact in a social environment.

我们都明白,孩子共同成长,有机会合作是很重要的,他们要成为朋友，要知道发生冲突的后果,要在社会环境里互动。

麻省理工公开课 - 媒体、教育、市场课程节选

How did you two become friends?

你们是怎么交上朋友的？

和朋友一起逛洛杉矶 - SpeakingMax英语口语达人

Picone imagined that, had he and Ravi become roommates, they might have become friends.

NEWYORKER: The Story of a Suicide

The Visitor shows what happens when these two people from two very different worlds become friends.

NPR: Learning to Drum �� and Live �� in 'The Visitor'

Edwards and Kucinich have become friends during the campaign, sources in both campaigns said.

CNN: Edwards, Kucinich agree to share support in Iowa caucuses