When someone asks me what business I am in. My face feelshot. I envy (嫉妒) people who can say that they are writers, bookkeepers and doctors. All these jobs speak for themselves. I really do make a living by __21__, and a good one, too. I can laugh like a king or like a schoolboy. It is a skill that I have learned,likethe skill of mending shoes. Whenever and however laughter is needed - I am asked to do __22__. I laugh like a bus driver or a shopkeeper. I laughsadly, kindly and happily. I need __23__ point out that a job of this kind is tiring. I spend most evenings in nightclubs. My job is to laugh during theweakerpart of the show. My loud, hearty laugher must be timed carefully. It must not come too soon, __24__ neither must it be too late. I go through life quietly. I cancopythe laughter of others. I can laugh in many different ways. But I'm not sure that I have ever heard the sound of __25__ own laugh.
选项：

A:hardly
B:my我的
C:but但是
D:it它
E:laughing笑,笑声