Read the following paragraph and write the topic sentence.

     Man begins life with a cry and ends it in stillness. All through his life he does everything he can to make a noise in the world, and there are few things he fears more than the absence of noise. Even his conversation is to some degree a desperate attempt to prevent a dreadful silence. If he is introduced to a fellow man，and a number of pauses occur ill the conversation, he regards himself as a failure, a worthless person, and is full of envy of the noisy talkative person. He knows that ninety-nine percent of human conversation means no more than the buzzing of a fly, hut he longs to join in the buzz and to prove that he is a man and not a waxwork figure.