President Xi addressed on 50 years China—France ties to celebrate the 50th anniversary of

问题补充：

President Xi addressed on 50 years China—France ties to celebrate the 50th anniversary of the of diplomatic relations between China and France.

A. assignment

B. distribution

C. establishment

D. acquaintance

答案：

A. assignment

B. distribution

(答案→)C. establishment

D. acquaintance

解析：四个选项的意思分别是：A assignment分给，分配，任务，工作，（课外）作业，B distribution分配，分布，C establishment企业，建立，（通常反对变革的）当权派，D acquaintance相识的人，熟人，相识。句意：习近平主席就50年的中法关系发表演讲来庆祝中国和法国建交50周年。根据句意选C。