My friends all (keep in touch with) each other over last Chr

keep in touch with each other by emails we wtill keep in touch with each other 中文 I keep in touch with my friends ( ）telephone. we are friends l hope we can keep touch with each other ofen Our classmate often keep in touch with each other on the pho how do they sometimes keep in touch with each other?是什么意思? We keep in touch with each other ________ letters and teleph We keep in touch with each other by e-mail.改为否定句 They promised to keep touch with each other. I( )to keep in touch with my friends through e-mail.怎么填? We keep in touch with each other____ letters and telephones. How do you keep in touch with your friends?