in the fascinating book he did not notice a thief enter his room.A. To absorbB. Absorbi

问题补充：

in the fascinating book , he did not notice a thief enter his room.

A. To absorb

B. Absorbing

C. Absorbed

D. To be absorbed

答案：

A. To absorb

B. Absorbing

(答案→)C. Absorbed

D. To be absorbed

解析：考查过去分词做状语，be absorbed in sth 表示沉醉于...痴迷于...全神贯注的意思。这里用过去分词做状语，句意：因为他全神贯注的在看书，所以没有注意到小偷进入他的房间了。选C。