Friendship needs care and attention to keep it in good health. Here are five ways to sustain (保持) long-distance friendships.

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● (1)                 

Anniversaries and birthdays carry even more weight in long-distance friendships. Although technology might make day-to-day communication possible, extra effort goes a long way on special days. Simply keeping a diary that keeps track of friends’ birthdays and other important dates will make sure nothing slips by you.

● Don’t rely on technology alone

(2)                 , but long-distance friendships—even close ones—may require more conscious effort to sustain. Try to seek out chances to renew friendships. How to do it? Just spend face-to-face time together whenever possible. 

(2)                 

Remember important dates

Compensate by writing letters

It is also helpful for you to be a friendship keeper

Try to find a time that works for both of you and stick to it

Friends need to talk about their preferred methods of communication

It is easy to have a sense of connectedness through social media

You may be the friend who left or the one who was left behind

设空处所在句子的后半句 “but long-distance friendships—even close ones—may require more conscious effort to sustain. (但是异地友谊——甚至是关系亲密的友谊——可能需要更加有意地去维系。)” 讲的是我们要更加有意地维系长距离友谊，其中 “but” 说明后半句与设空处形成转折，而F项 “朋友之间很容易通过社交媒体产生一种联结感” 讲的是可以通过社交媒体这种方式很容易与朋友产生联结，与后半句 “require more conscious effort to sustain” 形成转折，而且其中的 “social media” 呼应了该段的小标题 “Don’t rely on technology alone (不要仅仅依赖技术)” 中的 “technology”。故选F。