2. 专升本
  3. He was so absorbed______the work he was doing that he didn’t notice our entrance into the room.

He was so absorbed______the work he was doing that he didn’t notice our entrance into the room.

admin2021-08-03  5
问题 He was so absorbed______the work he was doing that he didn’t notice our entrance into the room.
选项 A、in
B、at
C、of
D、to
答案A
解析
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