The old couple preferred a flat in a small town to in so large a city as ChongqingA. thi

问题补充：

The old couple preferred a flat in a small town to in so large a city as Chongqing．

A. this

B. it

C. that

D. one

答案：

A. this

B. it

C. that

(答案→)D. one

解析：考查代词。一般说来, it指代同名同物; one与that则指代同名异物，根据句意可知指代为可数名词，故用one，选D。