As a teacher, I think teenagers use the Internet too much.They love being online and they spend most of their time on the Net.They use their tablets or smartphones to connect to the Internet but it is dangerous for their health and social lives. They also have problems with their families and schools because they don't have enough time to do homework or read a book or do something else. I always advise parents to pay attention to their children's Internet habits.
Which one is true according to the text?