单选题   She was so ______ in her job that she didn't hear anybody knocking at the door.
 
【正确答案】 B
【答案解析】 考查固定搭配。句意：她工作如此专心以至于没有听到有人敲门。be absorbed in为固定搭配，意为“专心致志做某事”。A、C、D均与句子构不成搭配。