【答案】
Online learning
Online learning, as a new way of learning, has been more and more popular among students.（点题）
It has many advantages. Through online learning, we can learn anytime and anywhere. We can choose what we want to learn freely.【高分句型一】（优点）However, it also has disadvantages. Some students lack self-control, so they spend too much time on computers or mobile phones. It's not good for their study. （不足）I think online learning is better. Because we can learn more knowledge which is not found in books.【高分句型二】In addition, online learning is more interesting than the traditional way of learning.（我的观点）
【解析】
重点词组有：
more and more，越来越
anytime and anywhere，随时随地
spend too much time on..，花太多时间在……
In addition, 此外
It's good for …, 对……是好的
【高分句型一】
We can choose what we want to learn freely.我们可以自由地选择我们想要学的东西。
what引导宾语从句
【高分句型二】
Because we can learn more knowledge which is not found in books.因为我们可以学习更多书本上找不到的知识。
which引导定语从句。
