People generally think that fairness and justice are at the centre of they are striving f

问题补充：

People generally think that fairness and justice are at the centre of they are striving for.

A. how

B. why

C. which

D. what

答案：

A. how

B. why

C. which

D. what

解析：考查宾语从句：of后面的宾语从句，宾语从句中strive for后面接宾语，句意：人们普遍认为公正是他们要力争的中心。选D。