Please choose the correct ending to complete the given sentence: Relationships: [header] How to keep in touch with long distance friend [title] Send regular emails. [step] Sending regular emails is an efficient and cheap form of communication that also allows you to pick up where you left off. Emails allow you to have a longer conversation at almost any time or place.

Ending1: [substeps] Try maintaining one longer conversation within an email thread. Send each other links of things you find funny or interesting to add to the conversation. Ending2: It also provides you with something to talk about during busy times. The more often you write over the phone, the less likely it is that you'll have to talk to one another throughout the day. Ending3: If you're near friends, check to see if you can get their messages right off the bat. Follow up with your friends through phone calls, email updates, or even chat. Ending4: Don't be afraid to leave a few unread emails or e-mails. [substeps] You can add this to your long distance calls.

Answer format: ending1/ending2/ending3/ending4