The great achievements in recent 30 years have proved that the reform and open policy is a

问题补充：

The great achievements in recent 30 years have proved that the reform and open policy is a vital measure that the national conditions of China.

A. fits into

B. turn into

C. break into

D. look into

答案：

(答案→)A. fits into

B. turn into

C. break into

D. look into

解析：考查词组：A. fits into适应B. turn into变成 C. break into破门而入D. look into调查，句意：最近的伟大成就已经证明改革开放政策最适合中国的现在状况。选A。