问题
单项选择题
I was ______ in my reading, and didn’t at first hear the doorbell ring.
A. immured
B. immersed
C. busy
D. infatuated
答案
参考答案：B
解析： immured“监禁，禁闭”；immersed“沉浸，使陷入”；be immersed in“专心于，沉浸于”；busy“忙碌”；be busy doing“忙于做某事”；infatuated“昏头昏脑的，使入迷”。答案是B。