2? He is consulting some materials in the library to prepare for the exam.
3? The materials here are not used for a long time and can be destroyed.
4? I surf the Internet mainly to watch news and inquire information, and occasionally play games and watch TV dramas.
The translation is as follows:
Because it is convenient and fast, I often look up information on the Internet.
He is doing some research for the exam in the library.
These long-term unused materials can be eliminated.
I mainly watch news and consult information online, but occasionally I play computer games and watch movies or TV programs.
I hope I can help you!