article: Everyone has got two personalities --- the one that is shown to the world and the other that is secret and real . You don't show your secret personality when you're awake because you can control yourself . But when you're asleep , your sleeping position shows the real you . During a normal night , of course , you often change your sleeping positions . The important position that best shows your secret personality is the one that you go to sleep in .
  If you go to sleep on your back , you're a very open person . You normally trust people and you are easily influenced by new ideas . You don't like to make people unhappy , so you never express your real feelings . And you also like to share your secrets with your friends . But you aren't very confident .
  If you sleep on your stomach , you are a person who likes to keep secrets . You worry a lot and you always easily become sad . You never want to change your ideas , but you are pleased with you life the way it is . You usually live for today not for tomorrow .
  If you sleep curled up , you are probably a very nervous person . You often protect yourself and you're always afraid of being hurt , so you are very defensive . You're shy and you don't usually like meeting people . You like to be on your own .
  If you sleep on your side , you have usually got a well-balanced personality . You know your strengths and weaknesses . You're usually careful . You have a confident personality . You sometimes feel worried , but you don't often get unhappy . You always say what you think , even if it makes people angry .
question: You may find this passage in   _   .
options: a science magazine A shopping guide book a sports newspaper a story book