He was sitting in an armchair a novel A. readingB. read C. was readingD. to be reading

问题补充：

He was sitting in an armchair, a novel

A. reading

B. read

C. was reading

D. to be reading

答案：

(答案→)A. reading

B. read

C. was reading

D. to be reading

解析：用reading 与novel构成现在分词短语，作伴随状语。