如下：

I have many hobbies. In my spare time, I like to listen to some pop music.

我有很多爱好，在我的业余时间，我喜欢听一些流行音乐。

especially the music played by some pop bands. It can make me relax and let me forget my unhappy moments.

特别是一些流行乐队演奏的音乐，它可以让我放松，让我忘记我不开心的时刻。

If I am in a good mood, I always read some history books. I think it is conducive to my study.

如果我心情好，我总是读一些历史书，我认为这是有利于我的学习。

In addition, surfing the Internet is another way of entertainment for me.

此外，上网是另一个我的娱乐方式。

Through the network, I can get some useful information and chat with my friends. The network shortens our distance.

通过网络我可以得到一些有用的信息和与我的朋友聊天，网络拉近了我们的距离。