article: It's the end of class.When the bell rings, students of Luohu Foreign Languages School in Shenzhen quickly take out their telephones.They want to log on to their micro blogs   to check the interesting things.They want to see what have happened in the last hour.
  Since several years ago, more and more people have used micro blogs in our country.Recent surveys   shows that most students in middle schools have a micro blog and some even update   their blogs over five times per day.
  "We learn many fresh and interesting things on micro blogs and they have become popular topics in class," said Kitty Jiang, 14."If you do not know about them, you are _ ." It is also a great place for students to say something about themselves."My parents always ask me to study hard, and encourage me before exams, but it really gives me pressure  ," said Alan Wang, 15."I share these feelings on my micro blog.My friends always give me answers in the same situation.This makes me feel better."
  But parents worry that micro blogging could be a waste of time.Some unhealthy information may even bring danger to kids, they said.
  Mr Shen, a professor   asks parents not to worry too much as long as kids are not crazy about micro blogging.Maybe it can become a window for parents to understand their children."If parents can read their children's micro blogs, they'll know what they think, they can know more about their children and help them solve their problems," he said.He also gives some advice for kids.
  -Don't micro blog for more than one hour a day.
  -Never micro blog in class.
  -Try to talk face to face with people from time to time.
  -Don't believe all the information on a micro blog.
question: According to the passage, what do students log on to their micro blogs to do?
options: check the things write articles listen to music call their parents