单选题 I was ______ in my reading, and didn’t at first hear the doorbell ring.
【正确答案】 B
【答案解析】句意: 我当时正专心读书, 起初没有听到门铃响。 be immersed in专心于, 沉浸于。immure监禁, 禁闭。 infatuated昏头昏脑的, 使入迷。