五年级上册英语第六单元的开头句子可能如下:
1. Unit 6: My e-friend
(单元主题:我的电子朋友)
2. This unit is about making friends online.
(本单元是关于在线交友的。)
3. In this unit, we will learn how to talk about our online friends.
(在本单元中,我们将学习如何谈论我们的在线朋友。)
4. Let's explore the world of e-friends together!
(让我们一起探索电子朋友的世界吧!)