单项选择题
Although he had stayed in that business for two years, （） he still wanted to switch to a different career.
A. and B. but C. yet D. so
单项选择题 He made it a rule never （） late.
单项选择题 -We didn't see him at the lecture yesterday. -He （） it.
单项选择题 leaving the market place, the fat man looked pleased （） himself（）having discovered a bargain.
