The boy is often found in reading books.
A. absorbs
B. is absorbed
C. absorbing
D. absorbed
网友回答
A. absorbs
B. is absorbed
C. absorbing
(答案→)D. absorbed
解析：D find sb.+ doing/ adj./ n /介词短语作宾补；在被动语态中，宾补变为主补，即sb. be found + doing/ adj./ n /介词短语。be absorbed in sth.“全神贯注于......”，是固定短语，作主补时需把be去掉。