1) I think I can live without internet. In my mind internet isn't a sense of life. There are many interesting things in the world. I can play with friends, read or dance. I can live without internet.
2) I can't live without internet. There are very exciting games and I like listening music! I always chatt with my friends. There are many interesting information in internet.
3) It is hard to answer for this question. There are as many positive and negative sides. Internet gives us a big library, music and free message, but there are bad games and angry people, 18+ content and others. Maybe it's not easy to live without internet.
4) I can't answer this question. I use internet only when I really need it. I don't play games and I havent got any virtual friends. Maybe it will be difficult, but I think I will.