There are many kinds (can't name them all off the top of my head)
1. Telling someone you'll keep it a secret and then tell anyway...
2. Always being there for someone and then not
3. When you cheat on your husband/wife or someone you're in a relationship with
4. Using someone just to get some
Those are all I can think of (at the moment). But you can just pick whichever one you want.
Answer:
1. Raising your hand and adding a comment to the discussion
2. Asking a question about the subject
You need to attach something brothers
Answer:
You may need to conduct research
Explanation:
Libraries are places were people go to read a book either for reaserch or for recreation