Many people use E-mail,blogs,text messages and social Web sites like Facebook to keep in touch with their friends.

VOA: special.2009.02.06

I think it's in part that, suffering from lupus, she was very much confined to her house in Georgia, and the letter writing, this kind of correspondence, was certainly a way for her to keep in contact with the world of readers and other writers and friends.

我想这多少与她，受病痛的折磨有关，受制于病情，她只能呆在,乔治亚州的家里，足不出户，所以写信，必然是她和读者、,其他作家和朋友联系的方式。

耶鲁公开课 - 1945年后的美国小说课程节选

How do you keep in touch with your friends?

你怎么和你的这些朋友保持联系呢？

一起长大的朋友 - SpeakingMax英语口语达人

With Facebook, I tend to use it to keep in contact with old friends

我用Facebook和老朋友保持联系，

用社交网站找到的人 - SpeakingMax英语口语达人