— Is Mr. Smith rich?— Yes very rich. When he worked in town he earned a lot. Now he has

问题补充：

— Is Mr. Smith rich?

— Yes, very rich. When he worked in town, he earned a lot. Now he has a big farm in country.

A. at; the

B. /; /

C. /; the

D. the; /

答案：

A. at; the

B. /; /

(答案→)C. /; the

D. the; /

解析： in town在城里，in the country在农村均为固定搭配.