Walking in an American middle school, I see groups of students, ___1____ cliques (小集团)， talking and walking together. If you go to a middle school I see the same. These students do almost ____2____ together: eat lunch, do homework, play sports, and go to movies.

   We all need a group of ____3____. They are the ones we run to tell how well we did on the last test. They listen when we complain how our parents made us do homework ____4____ playing with our best friends. They help us with tough homework problems.