4、gquestions?Whochooseyourfriends?Doyouchooseyourfriendsoryourfriendschooseyou?Haveyougotagoodfriendyourparentsdon'tlike?21. Manyteenagersthinktheir_______knowthembetterthantheirparentsdo.A.friends B. teachers C.brothersandsisters D. classmates22. Whenteenagersstayalone,theu