She was so______in her job that she didn' t hear anybody knocking at the door.
【正确答案】 A
【答案解析】be absorbed in…为固定搭配，意为“全神贯注于……，专心于……”。attract：吸引，常与介词to搭配使用；draw：拉，常与介词by连用；focus：集中于。故选A。