話題：

近幾年來，手機(jī)直播在年輕人中非常盛行，而這也是在四級(jí)考試中非常容易考到的話題。

參考范文：

In recent years, mobile live video broadcasting has been very popular among young people. People can broadcast their daily life anytime at any place as they like as long as they have a smartphone. In my opinion, there are disadvantages as well as advantages of mobile live video broadcasting.

On the one hand, mobile live video broadcasting enables people to show their talent online, which gives them a chance to earn money online. And it is also a good way to share their life experience with their friends and family. On the other hand, if people don’t use their time properly, they may become addicted to it. Particularly, if students spend too much time playing it, they may neglect their studies, which is not good for them.

In conclusion, mobile live video broadcasting is a fashionable way to enrich people’s life. However, we should make best use of our time and keep ourselves from being addicted to it.