The lady walked around the shops, ________ an eye out for bargains.
A. keep B. kept C. keeping D. to keep
The lady walked around the shops, ________ an eye out for bargains.
A. keep B. kept C. keeping D. to keep
C
考查非谓语。句子主语lady和keep 之间是主动关系, 而且walk和keep 同时发生，又不能作谓语，故用现在分词作伴随状语。