2. 外语
  3. I was______in my reading, and didn’t at first hear the doorbell ring.

I was______in my reading, and didn’t at first hear the doorbell ring.

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问题 I was______in my reading, and didn’t at first hear the doorbell ring.
选项 A、immured
B、immersed
C、busy
D、infatuated
答案B
解析 固定搭配。be immersed in为固定用法，意为“专心于，沉浸于……”。故答案为B。
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