People in Jilin are proud of they have achieved in the past ten years．
A. how
B. that
C. what
D. which
网友回答
A. how
B. that
(答案→)C. what
D. which
解析：考查宾语从句。What引导宾语从句they have achieved in the past ten years，并在句中做achieve的宾语。句意：吉林人民对于在过去30年中取得的成就感到非常骄傲。