Unit2RobotsBirth and deathBorn on 2 January，1920Died on 6 April，1992 in New YorkBefore working as a writerStarted working 1._ in his parents 2._ storeJoined the 3._ of the Philadelphia Navy Yard as a(n) 4._ chemist Became a biochemistry teacher at Boston University School of MedicineAs a writerHis 5._ for writing became obvious at 11 and he began to take himself seriously as a 6._Began having stories 7._ in science fiction magazines in 1939Published his first 8._ in 1950 and his first science book in 1953Received many 9._for his science fiction books and his science booksInvented a theoretical framework designed to show how ideas and 10._may develop in the future类类型型形式形式用法用法一般式一般式to be done发发生在生在谓语动谓语动作之后或作之后或与与谓语动谓语动作同作同时发时发生生完成式完成式to have been done发发生在生在谓语动谓语动作之前作之前