We had tried everything to improve their living conditions but it made little .A. goodB.

问题补充：

We had tried everything to improve their living conditions, but it made little .

A. good

B. use

C. result

D. difference

答案：

A. good

B. use

C. result

(答案→)D. difference

解析： make a /some/little/no difference有/有些/几乎没有/没有作用。