题目

完形填空 From Monday to Friday most people are busy working or studying, but in the evenings and at weekends they are free and   1   themselves. Some watch television or go to the movies, others take part in sports. This is decided by their own   2 .There are many different ways to spend our   3   time. Almost everyone has some kind of hobby : it may be something from collecting stamps to making model planes. Some hobbies are very  4 , but others don’t cost anything at all. Some collections are worth   5   of money; others are valuable only to their owners.I know 如图所示的四种现象中，是由光的直线传播形成的是