I found him sitting in his chair completely a magazine.A. absorbingB. being absorbed inC.

问题补充：

I found him sitting in his chair, completely a magazine.

A. absorbing

B. being absorbed in

C. absorbed in

D. absorbing in

答案：

A. absorbing

B. being absorbed in

(答案→)C. absorbed in

D. absorbing in

解析：考查过去分词作状语。be absorbed in 专心于做某事，句意：我发现他坐在椅子上，完全专心于一本杂志。在这里absorbed in 做伴随状语。