As time went by, Charlie Chaplin began __79____  films. He grew more and more ___80____ as his charming character, the little tramp, became known __81_________ the world, The tramp, a poor, _____82____ man with a moustache, ___83___ (wear) large trousers, worn-out shoes and a small round___84__ .He walked around stiffly ____85___ (carry) a walking stick. This character was a social failure ____86__ was loved for his optimism and determination to ___87_______ all difficulties. He was the underdog __88____ was kind even when others were unkind to him.

催化剂悬浮液为什么不能同母液同时注入反应器？