The kids are exchanging books since they both have a book that the other would like to read.
The people are cooperating by helping each other do things around the house, such as cleaning the windows
Either you have to go into the field or I'll tell them your secret.
The women compete in beauty contests to see who is most beautiful based on the standards of society.
The two kids aren't very fond of one another and the two had been having problems, which led to a conflict between the two
The kids, kid particularly, wants the one to do something and he is threatening them because he knows stuff about him their other friends don't.
The students have decided to come to a compromise between each other in order to give both of them what they want (books they've never read), even though they have to give up something in return (book they want).