What prevents people from being happy?

What prevents people from being happy? 英语could you tell me__that prevents her from being as happy a could you tell me (what it is)that prevents her from being a I try to understand ------that prevents so many people from it's good that you know what prevents you from ge Being beautiful can make people happy.Beauty could be enjoye what do we people from What do happy people have in common? he what's up man you mast being happy everday What can people learn from museums? He has____disability which prevents him from walking,but he The frozen subsoil prevents roots from growing deep enough t