We Nanjingers should try our best to maketo the Nanjing Youth Olympic Games.A. differ

问题补充：

We Nanjingers should try our best to maketo the Nanjing Youth Olympic Games.

A. differences

B. contributions

C. advances

D. records

答案：

A. differences

(答案→)B. contributions

C. advances

D. records

解析：考察名词词义辨析。A差异；B贡献；C进步；D记录；固定搭配make contributions to…对…做出贡献。句意：我们南京人应该努力给南京青年奥运会做出贡献。根据句意说明B正确。